rubber wheel 4.00-6 1,metal rim thickness 1.2mm, 1.5mm, 2mm 2,Tire 2pr,4pr,6pr,8pr 3,Bearing: 6204ZZ,6205ZZ rubber wheel 4.00-61,metal rim thickness 1.2mm, 1.5mm, 2mm2,Tire 2pr,4pr,6pr,8pr3,Bearing: 6204ZZ,6205ZZ4,5pcs/bag rubber wheel 4.00-6, 12*4" Rubber wheel