High-quality material selection: Our casters are made of high-quality carbon steel brackets, and the surface is treated with anti-oxidation, which is more durable. TPR rubber wheel surface has excellent noise reduction, wear resistance, shock resistance and other characteristics.. Suitable for furniture, scaffolding, workbenches, hospital equipment, industrial equipment, factory gates, etc. Super load-bearing: A single caster can bear 120kg, and every 4 casters can bear a weight of 400kg. Can meet the needs of most furniture. Double bearings are more stable: Our casters use built-in double bearings, made of stainless steel, and the top bearing is a steel ball bearing, which is flexible in steering, and has a long service life and stable operation. Extra-long thread: The length of the threaded bolt of this caster is 60mm, and it is equipped with an expansion rubber sleeve, which is suitable for installation with a diameter of 22-26mm. Our casters are professionally inspected and sold. They are suitable for all kinds of floors and carpets. You can buy with confidence. The bolts are lengthened and the size is M12*60mm. Please check the size carefully when buying., Manufacturer: maomaowujindian