---
product_id: 258641802
title: "KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink"
brand: "kraus"
price: "€ 1150.99"
currency: EUR
in_stock: true
reviews_count: 5
category: "Kraus"
url: https://www.desertcart.fi/products/258641802-kgu-413b-31-inch-undermount-single-bowl-black-onyx-granite
store_origin: FI
region: Finland
---

# Noise-reducing thick granite composite Black Onyx matte finish with UV protection 31-inch undermount seamless design KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink

**Brand:** kraus
**Price:** € 1150.99
**Availability:** ✅ In Stock

## Summary

> 🖤 Elevate your kitchen with timeless style and silent strength.

## Quick Answers

- **What is this?** KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink by kraus
- **How much does it cost?** € 1150.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/258641802-kgu-413b-31-inch-undermount-single-bowl-black-onyx-granite)

## Best For

- kraus enthusiasts

## Why This Product

- Trusted kraus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable Black Onyx Finish:** UV-protected matte surface that resists fading and maintains rich color over time.
- • **Quiet & Solid Performance:** Thick granite construction minimizes noise and vibration during use.
- • **Seamless Undermount Elegance:** Creates a sleek, flush countertop look that wipes clean effortlessly.
- • **Complete Installation Kit Included:** Basket strainer, mounting hardware, and towel ensure a hassle-free upgrade.
- • **Naturally Hygienic Granite Composite:** Silver-ion enriched material repels germs for a cleaner kitchen environment.

## Overview

The Kraus KGU-413B is a 31-inch undermount single bowl kitchen sink crafted from 80% natural granite composite with a matte Black Onyx finish. Engineered for durability, it features a noise-reducing thick stone-like material, a hygienic silver-ion surface that resists germs, and UV protection to prevent fading. Designed for seamless integration, it includes a basket strainer, mounting hardware, and a kitchen towel for easy installation, making it a stylish and practical centerpiece for modern kitchens.

## Description

Kraus Undermount granite sinks create an instant style upgrade for the kitchen. Constructed from 80% natural granite, with the look and feel of real stone, these modern kitchen sinks look striking in a variety of settings. Clean lines and thoughtful design details highlight the organic elegance of granite, for an eye-catching look with contemporary appeal. The extra-deep basins accommodate large dishes with ease, while the gently rounded corners make sink maintenance simple. Each non-porous, naturally hygienic sink is protected with a thermal finishing process, creating a surface that is highly resistant to heat, chemicals, scratching, chipping, and discoloration. This single bowl sink provides a lifetime of functionality with refined style. For added convenience, a basket strainer drain assembly and complimentary towel are included free with purchase. Constructed from premium stainless steel, the top-quality basket strainer assembly creates a tight seal to prevent food and debris from clogging the drainpipe. For easy installation, all mounting hardware is provided. Experience Kraus Quality and bring your best kitchen ideas to life. Crafted from 80% natural granite, Kraus granite sinks feature the look, feel, and texture of natural stone. A thermal finishing process results in a tough, nonporous surface that is resistant to heat, chemicals, scratching, chipping, and discoloration that will stand up to a lifetime of use. With a variety of size, bowl configuration and installation options, a Kraus granite sink can make a sleek and functional addition to any kitchen.

Review: I bought this sink for my wife with the pictured faucet as a birthday gift. Both are Kraus. I, having never installed a kitchen sink, was a little apprehensive about the install. I did all my research and made one trip to Home Depot for the things needed to install (Tail piece extension for plumbing modification, silicone, PVC cutter, Kraus drain cover, plumber's putty and a 5mm underlayment to cover up the water damaged flooring of the cabinet - it's temporary). I also got a new Insinkerator disposal mounting kit with gasket for disposal because the other one was scratched and worn. I got back home and proceeded to remove the 20 years worth of cleaners and stuff from under the sink. My hope was that the plumbing would line up perfect where my existing sink drain was and that the sink would fit perfect in the opening. Once I got the old out and dry fit the new sink there was a sigh of relief. The contractor cut the opening slightly larger than they should have for the prior sink so the new sink just barely fit and covered. It's close but it is covered. I had to use the black spacers that come with the sink install kit in order to tighten it down to the counter top. After dry fitting several times and making sure I had everything in order I ran one bead of clear silicone around the perimeter of the sink and set it in the opening. I adjusted it from side to side and front to back to make sure it was exactly where it needed to be then I started tightening down the mounting clamps. I like the hardware the sink comes with - the mounting clamps fasten to the sink with phillips head screws before you install then all you have to do is spin the clamp 45 degrees and tighten the phillips screws to snug it to the counter top. I tightened the screws like you would a wheel on a car - then I went around and snugged them down. I installed the disposal next and the tail piece lined up perfect with the p-trap as I had hoped it would. I measured and cut the tail piece and buttoned up the plumbing. Then I installed the faucet which is super easy. Drop it in the hole, tighten the nut hand tight then there are two locking screws with phillips head. After that all you have to do is hook up your water supply lines and turn the water back on. The description says you need a 36" wide cabinet but you can see in the images my cabinet is 34.5" inside and it fits perfect. There was plenty of room to mount the clips - you will need a long #2 phillips screwdriver. It also comes with the hardware for an under mount if that fits your application. It comes with a drain as well if you do not have a disposal. The sink comes with knock outs for a soap dispenser or air gap. I ordered the Kraus faucet with air gap because it was the only spot free stainless option. I did not use the air gap. I ran a loop up higher than where the line feeds into the disposal (found that handy info on YouTube) and zip tied it to one of the mounting clamps to hold it. All in all she loves it. The Kraus faucet with this Kraus sink is a perfect match. The sink is solid and seems to be very well made. The faucet feels high quality / heavy. The basin of the sink is huge compared to what we had and she loves the single drain on the right - you have a lot more surface area to use in the sink. She can now fit an entire pot, skillet or cookie sheet in the sink without it hanging out the top. This was a nice, inexpensive upgrade. When I ordered both items the faucet was $209 and the sink was $206. Both items arrived days earlier than desertcart promised so that was a bonus. We love the sink and not a single thing went wrong during the install. Everything went exactly the way I wanted. Not the way I expected which would have been just short of a disaster like most projects around here. The Kraus faucet I installed is the KPF-1610SFS - https://www.desertcart.com/gp/product/B0956JW96Z/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&th=1 If you are looking for something that won't break the bank but looks like it did - this is a great combo. Everyone who has seen it says "I don't even want to know what that cost". I was looking at stainless sinks before I found this one and I'm so glad we went this route over stainless. It is top notch. Five stars for sure.
Review: Looks great! Feels like a good quality sink.

## Features

- Undermount DESIGN creates a seamless transition from sink to countertop and makes it easy to wipe water and crumbs into the sink
- Dimensions | Overall – 30.5” L x 17” W x 8.88” D | Bowl – 28.37” L x 14.5” W x 8.88” D | Minimum cabinet size – 33” | Drain opening – 3-1/2”
- KITCHEN SET INCLUDES: Sink, Basket Strainer, Kitchen Towel, Mounting hardware, cutout template LIFETIME LIMITED and customer service that puts you first
- NATURALLY HYGIENIC material enriched with silver ions that repel germs for a cleaner sink | LOW MAINTENANCE SURFACE is highly resistant to dirt and grime, and easily wipes clean
- A QUIETER KITCHEN SINK: Thick stone like material engineered to eliminate vibration and noise when the sink is in use NON FADING COLOR with UV protection for a rich and consistent hue that will not dull over time

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00E6SP5R0 |
| ASIN  | B00E6SP5R0 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #181,055 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #449 in Single Bowl Kitchen Sinks |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,808) |
| Customer reviews | 4.6 4.6 out of 5 stars (2,808) |
| Date First Available | 6 March 2014 |
| Date First Available  | 6 March 2014 |
| Finish | Matte |
| Included components | Basket strainer, Kitchen Towel, Mounting Hardware, Sink |
| Installation Method | Undermount |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 13.8 Kilograms |
| Item model number | KGU-413B |
| Item model number  | KGU-413B |
| Manufacturer | Kraus |
| Manufacturer  | Kraus |
| Material | Quartz, Resin, Stone |
| Part number | KGU-413B |
| Pattern | Sink |
| Product Dimensions | 77.39 x 43.41 x 22 cm; 13.77 kg |
| Product Dimensions  | 77.39 x 43.41 x 22 cm; 13.77 kg |
| Shape | Rectangular with Rounded Corners |
| Size | 31 Inch |
| Style | Undermount |

## Product Details

- **Brand:** Kraus
- **Colour:** Black
- **Material:** Quartz, Resin, Stone
- **Product dimensions:** 43.4D x 77.4W x 22H centimeters
- **Size:** 31 Inch

## Images

![KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink - Image 1](https://m.media-amazon.com/images/I/71zwf6EYmaL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: Can double check if it comes with the strainer and towel?**
A: It does come with a strainer.

**Q: is it dark b;ack or more of a dark, charcoal?**
A: Black. It is a great sink, easy to clean and holding up to kids.

**Q: Our counter top hole size is 31x20. Is this feasible?**
A: The hole in my counter for this sink as an undermount is 28.5x18.5". I think your 31" dimension would be too big, even if the sink were drop-in mounted.

**Q: Is the color shiny black or matte black?**
A: Thanks for your inquiry. 

Our Granite inks are matte black. 

Thanks

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***R on 30 October 2022*

I bought this sink for my wife with the pictured faucet as a birthday gift. Both are Kraus. I, having never installed a kitchen sink, was a little apprehensive about the install. I did all my research and made one trip to Home Depot for the things needed to install (Tail piece extension for plumbing modification, silicone, PVC cutter, Kraus drain cover, plumber's putty and a 5mm underlayment to cover up the water damaged flooring of the cabinet - it's temporary). I also got a new Insinkerator disposal mounting kit with gasket for disposal because the other one was scratched and worn. I got back home and proceeded to remove the 20 years worth of cleaners and stuff from under the sink. My hope was that the plumbing would line up perfect where my existing sink drain was and that the sink would fit perfect in the opening. Once I got the old out and dry fit the new sink there was a sigh of relief. The contractor cut the opening slightly larger than they should have for the prior sink so the new sink just barely fit and covered. It's close but it is covered. I had to use the black spacers that come with the sink install kit in order to tighten it down to the counter top. After dry fitting several times and making sure I had everything in order I ran one bead of clear silicone around the perimeter of the sink and set it in the opening. I adjusted it from side to side and front to back to make sure it was exactly where it needed to be then I started tightening down the mounting clamps. I like the hardware the sink comes with - the mounting clamps fasten to the sink with phillips head screws before you install then all you have to do is spin the clamp 45 degrees and tighten the phillips screws to snug it to the counter top. I tightened the screws like you would a wheel on a car - then I went around and snugged them down. I installed the disposal next and the tail piece lined up perfect with the p-trap as I had hoped it would. I measured and cut the tail piece and buttoned up the plumbing. Then I installed the faucet which is super easy. Drop it in the hole, tighten the nut hand tight then there are two locking screws with phillips head. After that all you have to do is hook up your water supply lines and turn the water back on. The description says you need a 36" wide cabinet but you can see in the images my cabinet is 34.5" inside and it fits perfect. There was plenty of room to mount the clips - you will need a long #2 phillips screwdriver. It also comes with the hardware for an under mount if that fits your application. It comes with a drain as well if you do not have a disposal. The sink comes with knock outs for a soap dispenser or air gap. I ordered the Kraus faucet with air gap because it was the only spot free stainless option. I did not use the air gap. I ran a loop up higher than where the line feeds into the disposal (found that handy info on YouTube) and zip tied it to one of the mounting clamps to hold it. All in all she loves it. The Kraus faucet with this Kraus sink is a perfect match. The sink is solid and seems to be very well made. The faucet feels high quality / heavy. The basin of the sink is huge compared to what we had and she loves the single drain on the right - you have a lot more surface area to use in the sink. She can now fit an entire pot, skillet or cookie sheet in the sink without it hanging out the top. This was a nice, inexpensive upgrade. When I ordered both items the faucet was $209 and the sink was $206. Both items arrived days earlier than Amazon promised so that was a bonus. We love the sink and not a single thing went wrong during the install. Everything went exactly the way I wanted. Not the way I expected which would have been just short of a disaster like most projects around here. The Kraus faucet I installed is the KPF-1610SFS - https://www.amazon.com/gp/product/B0956JW96Z/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&th=1 If you are looking for something that won't break the bank but looks like it did - this is a great combo. Everyone who has seen it says "I don't even want to know what that cost". I was looking at stainless sinks before I found this one and I'm so glad we went this route over stainless. It is top notch. Five stars for sure.

### ⭐⭐⭐⭐⭐ Review
*by A***S on 16 November 2025*

Looks great! Feels like a good quality sink.

### ⭐⭐⭐⭐⭐ Review
*by J***A on 6 February 2023*

Recomendable, pues además del buen producto, el envío muy puntual

## Frequently Bought Together

- KRAUS Quarza 31-inch Undermount Single Bowl Granite Kitchen Sink in Black Onyx, KGU-413B
- Kraus Kitchen Sink Strainer for 3.5-Inch Drain Openings in Black, PST1-BL
- KRAUS Bolden Commercial Style 2-Function Single Handle Pull Down Kitchen Faucet in Matte Black, KPF-1610MB

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---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-10*