The wheels are made of iron. It is a heavy-duty wheel, often used in industry, and the load of 6 inch can reach 450 kg. The brackets of the wheels are thick and carry the weight well. There is a spring in the back, which can play a shock absorption role.
This wheel tread is made of PU material, and the core is made of PP material. The wheel diameter is 60mm and the wheel width is 44mm. The color is a classic red and black color scheme. The caster wheels contain two bearings, so a single wheel can carry up to 50 kg. The material of PU makes it wear-resistant and quiet, and is often used in skateboards and furniture beds.
