The wheels are unbreakable, maintenance-free and non-corroding. Wheel axle bolted. Tread non-marking.
Characteristic(s)
Material: 
Housing steel plate. 
Wheel body PA 6 with abrasion-resistant polyurethane tread. 
Version: 
Housing press formed. 
Double ball bearing with ball shield in the castor head. 
Plain bearing in the wheels.
