Wheel 
Standard ruer tread, hardness 80 Shore A. Polypropylene cee.
Plain bearing bore or roller bearing bore
The plain bearing bore results from a hole in the material forming the cee of the wheel and contains the axle. In the roller bearing bore, the bearing housing is obtained by moulding and contains cylindrical roller bearings with polyamide 6 cage.
Swivel top plate bracket type NL
Swivel top plate bracket type NL. The plate, the ball race ring and the fork are made of pressed steel zinc plated finish; swivel actidouble ball greased race with dust protectieal made of polyethilene. The king pin is integral with top plate and duly rivetted.