These wheels are manufactured from virgin Poly Propylene Co-Polymer (PP-CP), white in colour, by injection molding. The wheels are light in weight but have fair load carrying capacity. The acidic or alkaline chemicals have no effect on these wheels.
Polypropylene is a very good material to be used as the tread and/or hub centre. Wheels and wheel centres made of polypropylene are fracture resistant, vibration and noise dampening, high load capacity and low cost when compared to similar materials.