1. We have our own production factory and technical workers 2. Professional produce, quality assurance 3.good quality Material: rubber, nylon, polyurethaneFeatures: wear-resisting, small noise, corrosion resistance, impact resistance and flexible , track accurate,carrying capacity is strong, fashionable style WheelDiameter(mm)Wheelwide(mm)Load weightKg/wheelWheelmeterialBearing Screw ...