Item: Motorcycle tubes. Valve type: TR4, JS-87C. Material: Butyl. We're a professional manufacturer of bicycle/electric-bike/motorcycle tubes, tyres, we supply high quality butyl inner tubes, as well as self-sealant tubes (puncture tubes), cycling tubes, thron resistant tubes, superlite tubes, natural tubes, and bicycle tires.OEM production are available for us...Specification as bellowed for ...