This caster has the characteristics of quietness, wear resistance, stability, smooth rotation and good load-bearing performance. It can be widely applied to machines, electrical appliances, furniture, showcases, logistics, sports, industrial and other industries, real materials, quality and safety. Guarantee Features: New PVC material, thick bottom plate, widened wheel, smooth bearing, strong load bearing, easy to install, environmentally friendly material, strong wear resistance, ultra quiet, strong shock resistance, 360 degree free rotation 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 Specifications: 3 inches, 4 inches Type: universal wheel, directional wheel, brake wheel Material: brand new PVC Bearing capacity: single wheel bearing weight of about 300KG Application: machinery, electrical appliances, furniture, showcases, logistics, sports, industrial and other industries note: This product is limited to Swivel Castor Wheel, 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.