Tube valves Material: Brass, Rubber: Butyl rubber or natrual rubber Use: ... made of only the highest quality materials 2.The tire valves can be quikly mounted to the rim.It is ... with special rubber(as EPDM)compound to resist to O-zone damage and prevent temperaturedeterioration caused by rim hole ,heat, ... to : amy (at ) cneverwin.com Tubeless metal clamp-in Valves, tire valves V-4, V-5, valve stems