"5 x 2 swivel caster, cast iron (SS) wheel"
"Swivel 4 caster with 4 x 2 urethane wheel, total locking brak
Rigid 2 1/2 caster with 2 1/2 x 7/8 Protech wheel
2 threaded 3/8-16 x 1 stem caster Envirothane wheel SLB
Swivel 3 x 1 caster neoprene wheel threaded stem 3/8-16NC x 1