Alcoa O-Ring Seal Valve, O-Ring Seal Valves For Aluminum Truck Wheels (9.7mm Valve Hole), Rubber O-Ring Forms A Seal When Valve Is Clamped To Rim By Tightening Hex Nut, Designed For Use With 9.7mm (.390") Rim Hole, Designed Specifically For Use In Aluminum Wheels, Nickel Finish.