First, the 4 series of polyurethane (PU) single-round rounded edge maintenance, maintenance:
     When the routine inspection, check the installation section at PU wheel and axle is loose, whether the rotating shaft with debris, such as found in time to remove. Find wheels and metal parts have cracks, breakage, deformation, wear and so on, we need to replace the wheel.

Second, polyurethane (PU) single-round use: This product should never be overloaded or use of violence.

Third, polyurethane (PU) single-round service:
        1, do not exceed the maximum load above load.
        2, the product is suitable for flat ground, do not allow it to fall from the difference of height to avoid impact.
        3, if you need the power handling and traction, please contact us.

Fourth, polyurethane (PU) single round sale Description:

    Where the company's products, non-human damage, the use of non-overload damage can be replaced free of charge. Please do not use other specifications retrofit or repair parts. Free to change the consequences of the company is not responsible.