• Crown High Grade Elastic Polyurethane tread is chemically and mechanically bonded to aluminum core
• Non-marking crown tread polyurethane protects floors, helps reduce noise operation
• Resistant to most chemicals, oils, acids, grease and water
• Bearings: Two precision ball bearings
• Durometer: 85 Shore A (+/-5)
• Temperature range: -40° F to +180° F
• Working Speed: 3 mph (6 Km/h) 

Load Capacity: 4": 600 lbs, 5": 800 lbs, 6":1200 lbs, 8": 1800 lbs