... Colour: Black,Grey etc 2.2. Inner Tube Material: Natural rubber and Butyl rubberInner Tube Rubber Percentage: 20%,30%,40 ... 13" x 4.00-6 i) 12" x 3.50-6j) 12"x3.50-5 k) 11" x ... 1.1. We have own factory for Rubber Wheel,Solid Wheel,Flat Free Wheel,Motorcycle Tyre,Wheelbarrow Tyre,Inner Tube etc. ... advantage:1.We have a factory of rubber wheel,wheelbarrow tyre2.Currently our modle euipment and ...