CASTOR WHEELS: Plate ball bearing for each wheel, moving smooth, the load capacity for each casters is more than 85lbs. Plate Size: 1.9" (49mm) x 2.2" (58mm). Hole center to hole center: 1.3" (35mm) x 1.7" (45mm). Mounting hole dimensions: 0.23" (6mm) round). Overall Height: 2.5" (65mm). Castor Wheel Diameter: 2" (50mm). CASTOR Wheel Width: 0.8" (21mm). CASTOR Wheel Material: Rubber. Castor Wheel Color: Black. SMALL and STRONG: The castor wheels swivel made of the popular Non-Marking rubber type, very quiet running, absorbs shock and vibrations. Saving of time and labour. These powerful castor wheels can be used for a multitude of small projects. SWIVEL CASTORS ROTATE 360 DEGREE: Transform the mating equipment to any directions in the most efficient and labor-saving way, our castor wheels are the best accessories for the medium furniture, desktop, table, cabinet or trolley. QUIET RUBBER BASE WHEELS: Silent and no noise rolling, so don't worry to disturb others when moving your devices. WIDELY USED: Can be used in both industrial and residential applications, for coffee table, plant stands, bookshelves, shoe bins, toy bins, shopping carts, workbench, warehouse or supermarket shelves, they can be installed to most devices if you want.