The Invacare 3 Swivel Wheels with 13 Sure Glide Brakes makes it easier to maneuver the walker in confined areas. The breaks engage with pressure applied to the walker. This attachment adds 4 1/4 to the height of the walker Features3 Swivel Wheels with 13 Sure Glide Brakes Swivel Wheel Attachments add 4 1/4 to the height of a walker. Swivel wheel mounts allow the 3 wheels to turn in a complete circle. Specifications Height Adjustment Adult 34 40 Junior 29 35 Warranty 5 Year Limited Warranty NOTE All specifications, prices, and product configurations are subject to change without notification. Accessories and seating products shown in the photographs are not necessarily included in the base price of Wheelchair. 1 Pair / Pair