This listing is for a Set of (4) Cast Iron Industrial Swivel Casters. The casters have a 2.75" wide diameter and measure approximately 1" wide and stand at 6" tall from the bottom of the caster wheel to the top of the caster insert. The mounting plate on the caster is removable. Marked on the back of each caster is "833" surrounded by an oval. All are in excellent condition with no cracks, chips, or breaks in the cast iron. Please view all provided pictures and make a ju...dgement of the condition for yourself before bidding or purchasing. Feel free to ask any questions you might have.