"Rigid 5"" caster with 5 x 1 1/2"" Phenolic wheel."
"Rigid 5"" caster with 5 x 1 1/2"" Steel 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"
