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• All Frame Welded.
• 1600# Wheel Capacity  to Assure Ease of Travel.
• Soft Urethane Wheels For Quiet Rolling, Even on Uneven Surfaces.
• Two Swivel Casters and Two Fixed Direction Casters.
• Two Locking Casters Both The Axle And The Swivel Function.
• Ball Bearings in The Axle And The Swivel.
• These Will Never Leave a Mark on Any Floor.
• 16-Gauge Cold Rolled Steel Shelves.
• Durable Powder Paint Finish. Many Colors.
• All Tops Are 1.25" Thick.
• Bottoms Are Sealed In Brown Laminate To Resist Warping.