Pack of 2. Full 1/2" Inside diameter.• Maximum Working Pressures: 1/2" Hose: 20 PSI ; 1/2" In-line Valve:20 PSI; 1/2" Male and Female NPT Valves: 100 PSI; (1/2" Hose limits most applications to 20 PSI) • 1/4 turn shut off. body and stem material is acetal copolymer. Stem seals are nitrile.