"Rigid 4 x 1-1/2 caster, mold on urethane"
Swivel 4 caster with 4 x 1-1/2 inch phenolic wheel
Rigid 4 caster with 4 x 2 phenolic wheel
Rigid 5 inch caster with Moldon Poly. Urtethane wheel
"Rigid 5"" caster with 5 x 1 1/2"" Phenolic wheel."
4 x 1 1/2 Rigid with Phenolic wheel
"Rigid 4 X 1 1/4"" Pro wheel BB"
"Rigid 3 X 1 1/4"" Pro Wheel BB"
