Milton 440-2 3 1/16" Truck Valve Extension3 1/16" truck valve extensions are made of nickel plated brass and include a long skirt and a high heat cap. Made for use with trucks or buses to extend existing tire valve, these extensions have a .305-32 thread size and an overall effective length of 3 1/16".,Specifications: CONSTRUCTION: Nickle Plated BrassDESCRIPTION: Valve ExtensionTHREAD DIAMETER: .305-32BRAND: MiltonWEIGHT LBS: 0.074MANUFACTURERS PART NUMBER: 440-2EFFECTIVE LENGTH INCHES: 3-1/16LENGTH INCHES: 3-3/5