16-Pack Of 1-1/2" Deluxe Wrought Iron Chair Glides In Black. Heavy Duty Deluxe Wrought Iron Chair Glides : fit a 1-1/2" inside diameter cup on patio furniture feet. Please measure accurately. Protects your patio surface, patio chair feet and patio legs from damage. Provides a smoother movement of furniture, allowing patio furniture to slide over the surface of your patio. IMPORTANT-Always scrape away any worn metal or remains of old cap- before measuring and installing. Glides install inside the metal cup on the bottom of the chair or table. BE SURE to measure the inner diameter of the cup area to purchase the correct glide.