Features: Made of premium nylon and aluminum alloy, sturdy and durable. Adjusting gear can adjust the level to achieve very good anti-vibration performance, no sloshing structure, long service life. 360-degree swivel top plate with double ball bearing design, flexible to move and rotate. The feet act to reduce vibration while the machine is under use. Wide application: suitable for conveyor stands, medical equipment, copiers, printers, modular framing enclosures, electronic enclosures, manufacturing machinery and automation enclosures, shop equipment, diagnostic equipment, etc. Specification: Model: GD-40F Material: Nylon + Aluminum alloy Weight: Approx.1455g/ 51.3oz Mounting height: 70mm/ 2.8in Load Capacity: 100kg/ 220lbs (total) Package List: 4 * Caster Note: Please allow slight error due to manual measurement. Thanks for your understanding.