WEAR-RESISTANT: This Wheel Tire is made of rubber material, wear-resistant, not easy to wear and elastic. ADVANTAGE: Built-in accurate bearings, suitable for a of tool carts.Inflatable type changeable inner tube. With non- patterns on the tire,it is more stable. LOADING CAPACITY OF SINGLE TIRE: Good loading capacity of single tire, suitable for many working occasions. The load capacity of single tire is 250kg / 551.16 lb(.) Diameter: 150mm Material:Rubber + metal colour:Black + green Package Contents: 1 * Caster Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.