Natural rubber tube Brand Name:KINGSTONE Rubber percentage:45% Valve type:TR4 WE,SICHUAN YUANXING RUBBER CO.,LTD,AS THE MANUFACTURER OF KINGSTONE BRAND MOTORCYCLE TIRE AND TUBE,WE ARE THE ORIGINAL TITULAR OF THE TRADMARK "KINGSTONE",WE REGISTERED "KINGSTONE"TRADEMARK ON JAN 28 2006 IN CHINA.OTHER WHO CAN PRODUCE KINGSTONE BRAND MOTORCYCLE TIRE AND TUBE ALL IS FAKE. Motorcycle tubes