3/4-Inch high quality rubber; Non-corrosive brass screen; Provides watertight connection of hoses; Traps dirt and prevents clogging; Lifetime Limited Warranty. LDR 504 2610 Filter Hose Washers. 3/4-Inch high quality rubber. Non-corrosive brass screen. Provides watertight connection of hoses. Traps dirt and prevents clogging. Lifetime Limited Warranty.