3.00-4 flat free wheelbarrow tire made of high-quality PU-foam (polyurethane foam).The wheel rim is made from forget steel sheet coated with polymeric paint and bolted. The wheel axis is with double ball bearing with inner diameter 5/8 inch. Wheel axis hub is SYMMETRIC. This wheel does not fit Dolly's cart. The length is 3.15 inch. Temperature conditions while operating is from -30ºC to +50ºC, whereas the wheel hardly loses its density. Applicable to a warehouse, platform two-wheel trucks, hand truck, wheelbarrow, store equipment, can be used both on asphalt road and inside commercial, warehouse, industrial premises. The soft and smooth wheel moving, as well as, rolling resistance while moving on the rough surfaces such as doorsteps, road holes and pits, train tracks, and good sand and ground adhesion of wheels enable to carry loads unharmed. This wheel is flat free and noncorrodible. Outer diameter -10 Inches. Inner Bearing 6303 - 5/8 inch diameter. Hub lenght 3.15 inches . Wheel material: steel/ polyurethane foam With properties similar to solid wheels