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Activities and fixed casters casters are included. Activity is what we call universal wheel casters, its structure allows for 360 degree rotation fixed castors without rotating structure, can't move. Usually are two of the casters are generally with, such as the structure of the cart is in front of two fixed wheels, back near the caster are two activities and push bars.

Select a wheel material: first of all, consider the magnitude of the road obstacles, the use of residual material on the site (such as iron, grease), the environmental conditions (such as temperature, ambient or low temperatures) and wheels can carry the weight of wheels to determine choices for different conditions, such as material. For example: rubber-not acid-resistant, oil and chemicals, super high strength polyurethane polyurethane wheels, wheel, nylon wheel, steel wheels, and high temperature you can apply a different special environment.