8 Pack Heavy Duty Steel Gray Swivel Plate Caster Wheels (3.5″ Combo)
PLATE SIZE: 2.5" (63mm) x 3.5" (90mm). Hole center to hole center: 1.7" (44mm) x 2.8" (72mm). Caster Wheel Capacity: 350lbs each caster. Caster Wheel Material: Iron. Overall Heights: 4.5" (115mm).