"Grey hard rubber wheel, 4 x 1-1/4 x3/8 inch plain bore"
Black soft rubber wheel 4 x 1-1/4 x3/8 inch plain bore
4 x 1-3/8 inch sintered iron (semi-steel) wheel
4 x 1-1/4 Pro Wheel 1/2 PBB
4 x 1-1/4 Protech flat wheel 3/8 PBB
4x1-1/4 phenolic
