1.Size:350-4,350-5 400-6 250-4 350-6 400-8etc. 2.good ... ,Foam Wheel,Tubeless Wheel,Castor Wheel, Wheelbarrow Tyre&tube and etc.2. Pneuamatic Wheel=Tyre + Tube + Rim assembled2.1. Main Size ... :6"x1.5,8"x2.50-4,10"x3.00-4,10"x3 ... Range of Use: for wheel barrow,hand trolley,tool cart etc 2.5 wheelbarrow wheel. 3.50 ...