Features: 1.【Application】Check valves kit is designed for use with Briggs and Stratton, Snapper and Troy-Bilt pressure washers. 2.【Function】This kit is used to replace the check valve which can attach to the pump head to help maintain safe working water pressure in the pump. 3.【Superior Material】Made of high quality stainless steel with black oxide coating and high quality plastic and rubber for strength, durability and longevity, ensure anti-rust and have an unparalleled long lifespan. .