Our company supply inner tube (nature rubber or butyl rubber) for all kinds of tyres, such as truck tyre, light truck tyre, OTR tyre, motorcycle tyres, bicycle tyres. We also can supply valves for inner tube or for tubeless tyres, so if you are interested in this, please contact us. The main sizes: 23.50-25, 20.5-25, 17.5-20, 1200-24 1100-22 1100-20 1000-20 900-20 825-20 750-20 650-16 600-13 550-16 165/175/185-14 155/165-13and so on. We can produce according to your need, if you intersted, please contact me.