Regulate coolant or air flow to your work area. 1/4 turn of handle opens or closes the valve. Light-weight and compact for in-line use. Body and stem material is acetal copolymer. Stem seals are nitrile (Buna N). 1/2" Valve Specifications: -Full 1/2" inside diameter -Maximum working pressures: 1/2" Hose: 20 PSI, 1/2" Inline valve: 20 PSI, 1/2" male/female valves: 100 PSI -Body and stem material: Acetal Copolymer / Stem seal: Nitrile (Buna N) -1/4 turn shut off