1. medium-heavy duty castors 2. castors with different models 3. castors with factory price 4. considerate after-sell service Specifications1. material: cast aluminum, rubber, both swivel and fixed available, with brakes2. diameter: 100/125/150/200mm3. capacity: 250/300/350/400kg4. width of wheel: 50mm5. thickness of plate: 6mm6. plate size: 116*100mmWelcome to ask for more! Casters C550 WAR