FOUR E'S SCIENTIFIC 0.5 uL - 10 uL High-Accurate Single-Channel Manual Adjustable Variable Volume Pipettes

This functions exactly as you expect and is extremely accurate. I love how easy it makes measuring liquids. This is my first time with this brand and see no reason to choose anyone else in the future!

UPDATED REVIEW (2024-04-05):After posting my critical review (below) the company immediately reached out to me and offered to refund my purchase or send a replacement.I was frustrated with my original items defects, but considering the companies rapid polite & professional response I decided it was appropriate to give the product a second chance, it is possible after all that the original device I received was purely a defective unit, an anomaly.They sent me a replacement that arrived within a few days and that replacement has been performing properly since I received it. I am upgrading my review to 5 stars.I of course understand that occasionally products may be shipped with a defect. When considering products to buy online, more important than any rare defect, is a companies demonstrated history of good customer service.This company resolved my issue rapidly which makes me comfortable purchasing from them in the future. As such I now recommend this pipette. My replacement is working as it should and the price is very reasonable.Previous review below (2024-03-20)Very disappointed. Pipette lasted 30 days. After 31 days it is now inaccurate by OVER 20%. This is basically a toy that falls apart rapidly. This pipette should not be used for any purpose that requires even semi-accurate measurements.The only purpose I can see for this is to give it to your kids so they can pretend to do science experiments. Or maybe for something like mixing food coloring for coloring Easter eggs. I was using it to measure liquid extracts for adding to recipes, but even for that purpose I feel it is unsuited.I tested it when I got it and it accurately dispensed 5ml. NOW when I choose the 5ml setting it dispenses 6ml. When I select 4ml it dispenses 4.8ml. That is 20% EXTRA. An eye dropper style squeeze pipette is more accurate because at least it has volume measuring lines on the tube.The frustrating part is my Amazon return window literally closed two days ago.

Easy to use, great instructions and great quality! Gives. Me the accuracy and precision to deliver the minute quantity of medication my guinea pig need.

Los materiales se sienten de calidad media ,, las pipetas no son blancas ,sino que tienen una coloración grisácea,por lo demás funciona correctamente...

Buen producto rápida entrega

I have been using it every day for a year to count yeast in a hemocytometer.

I purchased both the 1-10ml and 100-1000ul pipettes. The 1-10ml has worked great although it needed calibrated. The 100-1000ul has never been accurate and won't calibrate. The calibration nut screws all the way out, so I can never calibrate it. To dispense 1000ul I have to set the pipette to 700 and measure accuracy ever time I use it. I've torn it apart, cleaned it, lubricated it with the same result. I tried contacting Four E's several times and never got a response. I will be looking for another vendor.

Has more mechanical failure than this durability. The product life is very short due to its build quality. However the product is very accurate and serve its purpose very efficiently.