We offer discount for large quantity. We invite you to us!4 pcs. Retractable Leveling Casters Industrial Swivel Caster Trolley Caster For Office Chair Trolley 330 Lbs Capacity GD-40Type: Furniture CastersProduct: CastersItem Type: Furniture WheelsModel Number: 1.5 Inch Silent Casters To Make Office Chair Swivel CastersCondition: And NewFeatures 1: Office Chair On WheelsFeatures 2: Swivel Rubber Casters Removable Soft Safe RollersFeatures:Made of nylon and metal, Sturdy and . The gear adjustment can adjust the level to achieve very good anti-vibration performance, no sloshing structure, long service life. Top 360 degree swivel plate with double ball bearing, flexible to carry and rotate. The feet work to reduce vibration when the machine is in use. Wide application: suitable for conveyor racks, hardware, copiers, printers, modular skeleton enclosures, electronic enclosures, production machinery and automation enclosures, shop equipment, diagnostic equipment, etc. Specification: Model: GD-40F Ball: White + Black Material: Nylon + Metal Weight: About 1455g / 51.3oz Mounting Height: 70mm / 2.8 in Load Capacity: 150kg / 330lbs (Total) Package Content: 4 * Retractable Leveling Casters Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/