1.Size:350-4,350-5 400-6 250-4 350-6 400-8etc. 2.good gas tightness 3.wheelbarrow 4, ... Wheel=Tyre + Tube + Rim assembled2.1. Main Size:6"x1.5,8"x2.50-4,10"x3.00-4,10"x3 ... Use: for wheel barrow,hand trolley,tool cart etc 2.5 wheelbarrow,Wheelbarrow wheel,inner tube,Hand trolley. WB2206 Wheelbarrow