is it dark b;ack or more of a dark, charcoal?

Black. It is a great sink, easy to clean and holding up to kids.

Our counter top hole size is 31x20. Is this feasible?

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.

Is the color shiny black or matte black?

Thanks for your inquiry. Our Granite inks are matte black. Thanks

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Kraus KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink

Kraus KGU-413B 31 inch Undermount Single Bowl Black Onyx Granite Kitchen Sink

4.4/5

Product ID: 50199419

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Details

Brand
Kraus
Colour
Black Onyx
Material
Granite
Size
31 Inch
Style
Undermount

🔇Sound-absorbing non-porous surface

🔥Heat-resistant up to high temps

🪨80% natural granite composition

Description

🖤 Elevate your kitchen game with the timeless Black Onyx granite sink!

HEAT NO SWEAT - Thermally finished to resist heat, chipping, and discoloration—perfect for busy kitchens.
WHISPER QUIET WASHES - Naturally sound-absorbing surface keeps kitchen noise down for a peaceful cooking vibe.
STONE STRONG DURABILITY - Crafted from 80% natural granite for unmatched resilience and authentic stone feel.
SLEEK UNDERMOUNT ELEGANCE - 31-inch black onyx undermount design blends seamlessly with modern countertops.
ALL INCLUSIVE INSTALLATION KIT - Comes with mounting hardware, basket strainer, and even a kitchen towel—ready to install and impress.

The Kraus KGU-413B is a 31-inch undermount kitchen sink made from 80% natural granite, featuring a black onyx finish. It offers superior heat resistance, sound absorption, and durability against chipping and discoloration. Designed for seamless installation, it includes all necessary hardware and accessories, making it a stylish and practical upgrade for any modern kitchen.

Specifications

Manufacturer	Kraus
Part Number	KGU-413B
Product Dimensions	43.41 x 77.39 x 22 cm; 13.77 kg
Item model number	KGU-413B
Size	31 Inch
Colour	Black Onyx
Style	Undermount
Finish	Black Onyx
Material	Granite
Pattern	Sink
Shape	Rectangular
Installation method	Undermount
Item Package Quantity	1
Included Components	Kitchen Towel, Sink, Mounting Hardware, Basket strainer
Batteries included?	No
Batteries Required?	No
Item Weight	13.8 kg

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€ 1669.27

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Neha S.

Excellent communication throughout the order process. Product is perfect.