it is 10x350-4 pneumatic rubber wheel,it is for wheel barrow,hand trolley,tool carts etc our company mainly produce many kinds of tyres, tubes, rubber wheels, casters and other rubber products, and the size is from 5 inch to 18inch, such as 5x2 inch,8x2.50-4,10x3.50-4,13x4.00-6 16x4.00-8 16x6.50-8 18x6.50-8 etc. now we have many kinds of new products,such as PU wheel,rubber mat,cow mat,semi-pneumatic rubber wheel,wheel barrow,hand trolley,tool cart etc