Specification: /br/br Model: GD-60F/br Material: carbon steel, NBR, aluminum, nylon, ABS/br Capacity: 1 caster 551 lbs, 4 casters 2200lbs; /br Wheel Diameter: 50mm/2.5inch; /br Top Plate : 72x72mm/ 2.8x2.8inch; /br Bolt Holes: 70x70mm/2.75x2.75inch; /br Leveling Extent:8mm/0.4inch; /br Overall Height : 95mm/3.8inch/br/br