Shock Absorbing Casters Products DescriptionProuducts Name: Shock Absorbing CastersMaterials: Polyurethane (PU)  Model: Iron Core Casters,Website:http://www.dc-casters.com, Plastic Core CastersDC CASTERS Shock Absorbing Casters chose Vertical Spring Casters . Until now , DC CASTERS have 6 Inch and 8 Inch spring Casters, which loading capacity are 400KGS to 420KGS. It is suitable to work at the temperature from -35℃ to 90℃. Spring Casters are agility, shock absorbing, impact resistant, durability, water proofing, anti-corrosion. Specification:Wheel MaterialsWheel Dia.(Inch)Wheel Width(MM)Overall Height(MM)BearingLoading Capacity(KGS)Iron corePU6"48200Double Bearing4008"48240Double Bearing420Plastic CorePU6"48200Double Bearing4008"48240Double Bearing420