013 Viton O-Ring, 75A Durometer, Black, 7/16" ID, 9/16" OD, 1/16" Width (Pack of 100)

I ordered a 013-75 viton o-ring. I received an o-ring that has a cross section much too thick for a 013 oring. The label on the package (as well as the item description) says it should have a cross section of 0.070" or 1.78mm. This is obviously much bigger, measuring 2.68mm on a caliper with the material slightly depressed (so probably actually 2.78mm).The description says it should be Sterling Supply. I've received numerous o-rings from Sterling Supply and this is not Sterling Supply (unless they package things completely differently).

Just got these, quality appears to be very good. The o-rings that arrived are Brown rather than Black as stated in the ad. I actually prefer this, as I like viton rings to be brown and buna to be black to help keep them straight.

Ok, so these are probably not the main purpose of these but these are PERFECT -- 100% PERFECT - for restoring 3.75" toys that have an O-Ring. Great product and great deal!!

Vinton 0113 orings are a proper fit,and good quality. They are as described.

Used to repair airguns. 75D works well.

Used these o-rings during an oil change on '06 88" HD Wide Glide. Worked perfectly!

Sizes 13 and 18 are what you need for your Silencerco SS Sparrow. They fit perfectly. I bought the 100 pack of each so that should get me through an afternoon of shooting.

Fits perfectly in Silencerco Sparrow SS. Quantity/price that let's me replace each time I clean.