Set of four Casters, general purpose, office chair, steel bracket Swivels, berrings, two have stoppers Wheels measure 3" Two castors have locking mechanism great condition Shipping: If you are buying more than one item, please remember to check off the area that requests the seller to send an invoice, so I can combine the order for you before you pay Thank you again for browsing in my store, there is always something new and exciting coming your way! Feel free to ask questions, and let me know if there is a problem with an order before putting in a claim with, so we can work things out. Thank you again Estate Treasures by Alana