This load-bearing wheel adopts thick steel plate bracket, strong wear resistance, thickened and reinforced shaft, durable and non-deformable, plastic dust cover design, anti-winding dustproof, fine workmanship, beautiful appearance, directional wheel, universal wheel, Brake wheels, a variety of styles, a variety of sizes, you can choose Features: natural rubber material, dustproof ring, plastic dust cover, ball bearing, thickened bearing rivet, thick steel plate bracket, environmentally friendly mute, 360 degree free rotation, with brake, strong load, easy to install, strong wear Free combination of casters, can be freely matched according to your needs A: directional wheel x4 B: universal wheel x4 C: brake wheel x4 D: 2x directional wheel + 2x universal wheel E: 2x directional wheel + 2x brake wheel F: 2x universal wheel + 2x brake wheel Product Name: Heavy Duty Castors Color as shown Specifications: 4 inches, 5 inches Type: directional wheel, universal wheel, brake wheel Material: rubber 4-inch single wheel load: 140KG 5-inch single wheel load: 150KG Suitable for: warehouses, shelves, trolleys, flatbeds, scaffolding, logistics and transportation, factory terminals, etc. note: 1. Package Content: Casters x4 2. The size of this product is measured by hand. There may be a slight error. Please refer to the actual product. 3. The products are taken in kind, due to lighting / light and other reasons may have a little color difference, please refer to the actual product. 4. We are 1-2 days delivery, 15-25 days to arrive, if you have any questions, please contact us, we strive to make you satisfied.