uxcell Nitrile Rubber O-Rings 44mm OD 40mm ID 2mm Width, Metric Sealing Gasket for Automotive Machine Plumbing, Pack of 10

These turned out to be the wrong size for what I was doing, but they are still perfectly good O-rings.

It's always a risk, going with an off-the-shelf product instead of the manufacturer's part. In this case, it was not easy for me to ascertain whether the advertised Kohler o-ring on Amazon was the right one. At $7.99 for a single O ring, I decided to take a chance on these uxcell rings, at 10 for $7.03. If they fit, I am fixed for the life of my kitchen. These fit perfectly, but make sure what you have is this: https://www.amazon.com/gp/product/B000MF6VKG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1When I moved into my house, the previous owners obviously were not handy, and there were 3 different kinds of sink stoppers in the drawers and under the sink, and of course, none of them worked. So I looked at the drain, saw it was Kohler, and took a chance by ordering the above product for $21 plus tax. Ouch. And of course after 1.5 years of use, the o-ring stretched and failed. Few things in life are more frustrating than to fill a sink with hot water, put soap and a bunch of dishes in it to soak, come back 15 minutes later and find the water gone!Anyway, now that I have put the uxcell O-ring in, the basket sits properly and the sink holds water easily. I also note that I went to the hardware store (Ace Hardware) and they had a nice assortment of O Rings, and did not purchase one because I though it looked too small. In retrospect, I believe it would have worked also, but in that case, I would have gotten 2 for $3.50, or 1.75 per o-ring, compared to the UXCELL rings at $0.70 per. Kind of a case of 6 of one, 1/2 dozen of another. Anyway, these work, and I am happy with the purchase, and YOU benefit because now you have the exact measurements in the description of this product.

All goid

If you need them quick this is the place to get them but if you can wait, order them from grainger or McMaster carr.

The o-rings received are neither made to the advertised specifications nor made to industry standards. The advertised specifications show that the o-rings have a 2 mm cross section (which is an industry standard for metric 0-rings). The o-rings received have a 1.5 mm to 1.6 mm cross section. The received o-rings fail to properly seal a space that requires a 40 mm ID X 2 mm width o-ring. The Chinese maker did not use enough nitrile rubber to produce properly sized o-rings.

I purchased these to replace the existing ring burr O-ring on my Baratza encore ESP. They are slightly thicker than the OEM O-ring. This seems to allow the ring burr to fit a bit more snug which intern appears to have improved. Grind quality.

Can't say if it will fit yours, but these did the trick for me to fix leaky tubs, and saved having to change the stoppers out.

Sizing is close enough for most applications but not exact. Slightly too large on a 35.7mm diameter motor