... With stand heavy strength and abrasion resistant. Qingdao Shitong Rubber&Plastic Products Co., Ltd. is a professional inner tube manufacturer and ... a detailed reply5.OEM accpted6.Material : butyl rubber and natural rubber And we also have many other productions demond ... specification,Such as:Size,Tyre layer or Weight,Pattern,Rubber percentage,Packing,Destination Port,Payment Terms and Quantity etc ...