4″ Rigid Poly Steel Top Plate 4″ x 4-1/2′82PU40Offering exceptional quality, functionality, value and availabilityThis caster class is most recognized and commonly used
4″ Swivel Polyurethane Steel Top Plate 4″ x 4-1/2″72PU40Offering exceptional quality, functionality, value and availabilityThis caster class is most recognized and commonly used