Wheel diameter: 4"
Thread width: 1-1/2"
Bearings: Precision  bearing
Bore: 3/8" precision
Top plate: 3-1/8 x 4-1/8"
Durometer: 95 Shore D (+/-5)
Temperature range: -40F to +475F continuous, 550F intermittent
Capacity: Up to 600 lbs
Construction: Macerated construction with cellulose fibers and impregnated with phenolic resin. Excellent durability, non marking and floor protective. Resists water, grease, animal fats and most acids and alkalies.