20pk +Towel Umarex / Hammerli 12 gauge barrel seals viton/FKM Check 4 total o-rings in kit

4 total o-rings in kit

Also fits Push Pull and Slide pool/spa valves

Buna-nitrile is vulnerable to acetone

402708 Gasket

which uses thinner o-ring in K4 pack

20pk +Towel Umarex / Hammerli 12 gauge barrel seals viton/FKM Check 4 total o-rings in kitTowel is lint free microfiber; color will vary. Available either as a 10 pack or 20 pack. Also available with silicone grease instead of towel. Disclaimer: FKM and Viton are fluorocarbon. Viton is a name Brand commonly used to refer to FKM and is being used here only in an effort to explain and not as a brand name. There is no implication nor suggestion these are Viton branded. They are O Ring Depot branded.