Tube valves Material: Brass, Rubber: Butyl rubber or ... quality More models are available.METAL Clamp-in Brass Valve 1)Rubber Material available: natural rubber, EPDM2)Stem ... )certificate:ISO9001:2008 and TS16949Product Name: Rubber based Tube Valves for Truck and busModel Number: TR444 1. ... +86 133366-57152mail to : amy (at ) cneverwin.com TR445, Tube valves, valve stem tire, gate valve, pressure valve