Model Number: 3.50-4-#9063 Key Specifications/Special Features: Advantages of PU wheelSolid polyurethane wheels are widely used for wheelbarrow, lawn cart, hand trolleyMore economic and environment-friendly than rubber wheelsGood in resilience and can be made in different coloursLightweight and durableBoth heat and cold resistant and excellent in elasticityResistant to water, oil, dirt, acid and alkali