"Rigid 4 x 1-1/2 caster, mold on urethane"
Swivel 4 caster with 4 x 1 1/2 Moldon Urethane wheel
"Swivel 2"" Twin wheel caster with 7/16 x 7/8"" grip stem"
Swivel 4 caster with 4 x 1-1/2 inch phenolic wheel
Rigid 5 inch caster with Moldon Poly. Urtethane wheel
"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
