描述
Bracket: Made of heavy pressed steel. Bolted wheel axle. Zinc-plated, blue-passivated, Cr6-free. Wheel: Made of impact-resistant, hard and tough, highly compressed cast nylon. Bearing type: Ball bearing: Two pressed-in ball bearings, lubricated with long-life grease. Spherical roller bearing: Two pressed-in spherical roller bearings, sealed, extremely rugged, very durable, lubricated with long-life grease. Chemical resistance: High chemic