279 Pcs Small Rubber O Ring Orings Seal Plumbing 18 Sizes Box Assorted Kit Set
Hydrogenated nitrile butadiene rubber (HNBR), also known as highly saturated Nitrile butadiene (HSN), is a special type of nitrile butadiene rubber (NBR) used for mission critical applications. There are 18 most commonly used O-ring sizes.