Wheel material: Black rubber tread + plastic wheel core, Rubber Double Brake Caster with excellent elasticity and wear resistance, good aging resistance, excellent low temperature resistance, low heat generation under dynamic load, suitable for electrical equipment industry, Caster Wheel Outdoor trolley industry, garbage Use when the car is suitable for high loads. For more Caster Wheel Problems, please contact us. Hardness of tread: 85(±5) Shore A Temperature: - 40 / + 80 °C Wheel Dia: 160mm, 180mm Load capacity: 160-200kg Double-brake caster with movable bottom, movable compact wheel frame, bearing plastci roller bearing Wheel Material: Black rubber with PP core Housing made of pressed steel, Zinc plating Housing: Flat plate swivel caster with total brake