... wheel barrow inner tube / butyl inner tube / natural inner tube 1 Soft, enough width with long ... Products Co., Ltd. is specialized in manufacturing variour model natural and butyl inner tubesThe detailed sizes are as following: ... Wheelbarrow inner tube (natural and butyl): 2.50-4, 3.00-4, ... 8, 3.50-8, 4.00-8Motorcycle inner tube(natural and butyl): 2.50-17, 2.75-17, ...