10"×4.10/3.50-4 Hand Truck Flat Free Wheel Benefits 1. Using the flat free hand truck wheel, there is no need to deal with deflate or inflate tires. 2. Puncture free, microcellular polyurethane replaces the air in flat pneumatic tires. 3. Long lasting - this tire could outlast the lifetime usage of your equipment. 4. With easy rolling you can do the same job with less effort. 5. The flat free hand truck wheel reduces costs and efforts spent for replacing tires. 6. It has no Pb, Cd, Cr or other substances hurting the environment or the user's health. 7. The flat free hand truck wheel is shock absorbing. 8. It's ideal for trucks, trolleys, tool carts, barrows, lawn mowers and many other applications.