The flat top of this caster adopts the reinforced riveting technology to make the flat top stronger. The underlying design has the advantage of dustproof ring to prevent debris from entering. The craftsmanship is superb, beautiful and elegant, the bearing capacity is stronger, ultra-quiet, shockproof and good. More labor-saving, directional wheel, universal wheel, brake wheel, a variety of styles to choose from, you can freely mix and match Features: reinforced nylon material, galvanized bracket, bearing steel ball, high quality dust ring, strong load bearing, easy to install, environmentally friendly materials, strong wear resistance, ultra quiet, shockproof, 360 degree free rotation Product Name: Casters Specifications: 8 inches Type: universal wheel, directional wheel, brake wheel Material: reinforced nylon, galvanized bracket Bearing capacity: single wheel load 500KG Applicable: heavy industrial casters such as scaffolding wheels, flatbeds, trolleys, etc. note: This product is limited to casters, does not contain other products, depending on the actual product. The size of the product is measured by hand and may have some error. This is normal. Due to the light of the display, the color of the picture and the actual object may have a certain color difference, please understand. 1-2 days delivery, 15-25 days to arrive. If you have any questions, please contact us in time, we will solve any problems related to the product in time.