The castors are made of durable thermoplastic elastomer (TPE) and high quality steel. The surface is chrome plated to avoid rust and corrosion, and can be used for a long time. The size of the L-shaped plate is approx. 32 x 25 mm (L x W), the installation height is approx. 39 mm and the wheel diameter 1 inch. The load capacity of each run is 11 kg, and the maximum load capacity of each package of 4 wheels is 44 kg, which can carry heavy items. The use of TPE material will not scratch or damage your floor. Equipped with 360 degree rotating wheels, easy to move. With 5 mounting holes for easy installation. L-shaped side design saves installation space and is suitable for replacing cots, strollers, kitchen cabinets, storage shelves, coffee tables, work tables and other movable furniture.