Glides for 1 Inch suit both the 1 Inch models with seats in recycled plastic, plywood or upholstery, and the 1 Inch All Aluminum chairs and stools. (Please note that the all-plastic 1 Inch Reclaimed chair requires different glides.) Glides are tailored to fit either the chair or stool models, from low stool to barstool. The glides are made from TPU plastic, for allround use, including outdoor. All glides ship in a set of four.