Optional Casters For Wire ShelvingHelps make moving wire shelving easy with the caster kit for wire shelving. Snap-ring around stem makes for easy attachment. Four 5" hooded wheels with bumpers supports up to 600 lbs. each. Using casters may reduce load capacity to 2400 lbs. for the shelving unit. Caster/Glide/Wheel: Four 5" Hooded Casters (2 Locking) with bumper.; Color: Gray; Stem Type: Snap Ring.