Rigid 6 caster with 6 x 2 RollXWow wheel.
Swivel 6 caster with 6 x 2 RollXWow wheel.
"Swivel 6 caster, 6 x 2 Mold-on urethane wheel, total lock"
Swivel 6 caster with 6 x 2 Mold-on urethane wheel
Swivel 6 caster with 6 x 2 Phenolic wheel
Rigid 6 caster with 6 x 2 Mold-on urethane wheel
Rigid 6 caster with 6 x 2 RollX (RT) wheel