High-quality materials: The ball bearing transfer case is made of stainless steel. Which is durable and has a long service life. Size: 7.1 * 7.1 * 3 cm. Quiet transportation: The ball casters with steel surface are very smooth, the stability is good and it is wear-resistant, no loud noise occurs during transportation, and can be rotated 360 degrees during use, which greatly reduces the labor intensity of workers and improves work efficiency. Easy installation: Two-hole flange, round ball bearing mounting type, small swivel casters. Just use screws to fix the furniture casters to the objects to be transported. (Screws not included) - Widely used in transmission systems, processing systems, etc. Wide Application: Furniture ball casters can not only help with the transportation of goods at home: shelves, scooters, coffee table wheels, drawer wheels, but also widely used in industry: electronics, hardware, machinery and other industries, the perfect choice to reduce the labor intensity of