4 Heavy Duty Caster Set 8 All Steel Wheels Rigid Swivel and Brake

8"x2" - 4 Caster Set. 4 Rigid - 4 Swiwel - 4 SB (4 Swivel with Brake) - 2R + 2S (2 Rigid + 2 Swivel) - 2R + 2SB (2 Ridid + 2 Swivel with Brake) - 2S + 2SB (2 Swivel + 2 Swivel with Brake).