TRUCK TYPE,BALL BEARING,SIZE 152.4 MM (6 IN) WHEEL DIA X 50.8 MM (2 IN) TREAD WD X 187.3 MM (7-3/8 IN) HT,215.5 KG (475 LB) LOAD,4 BOLT MTG,BRIGHT CHROMED ZINC FINISH,RIGID, SOFT RUBBER TREAD, MOLDED TO HARD RUBBER CORE