6" X 2" Spring Loaded Swivel Caster - 1,500 Lbs Capacity Delrin Plastic Bearing (1/2") / Select Your Raceway Style / No Brake

6" X 2" Rubber On Nylon Wheel Heavy Duty Spring Gate Caster

6" X 2" Spring Loaded Rigid Caster - 1,500 Lbs Capacity Delrin Plastic Bearing (1/2")

3" Spring Loaded Swivel Gate Caster With Brake Hard Rubber DH Casters | Woodworker Express

Casterhq 3" X 1-1/4" Solid Poly Spring Loaded Caster - 300 Lb | Casterhq, No Hardware

8" X 2" Polyon Cast Spring Loaded Swivel Caster - 675 Capacity