Polypropylene wheel Injection molded polypropylene. With standards very high impact. Floor protection,Non-marking. Polypropylene wheelWheel Material:polypropylene Features as below:Injection molded polypropylene.With standards very high impact.Floor protection,Non-marking.Unaffected by chemicals,oils solvents or waters.Colors:black is standard,other colors available. Wheel Dia.(in.)Tread Width ( ...