Feature: 1. UPGRADE PART: Standard hole diameter, compatible with most walkers, transform the walker into a rolling walker, help the elderly walk more easily and with less effort. 2. UNIVERSAL WHEELS: Plastic wheels with universal rotation, suitable for tile, concrete, wood, carpet and other surfaces, won't leave marks or scratch the floor. 3. EASY TO INSTALL: A total of 2pcs walker wheels are included, easy to install, no extra tools needed, just remove the lower part of the front leg of the walker and install this wheel. 4. ADJUSTABLE HEIGHT: Seniors walker wheels are height adjustable, support 5 gears height adjustable, with locking fixed hole diameter, stable and reliable use. 5. STABLE AND DURABLE: This walker caster wheel is made of premium aluminum alloy legs, sturdy and durable, no deformation, strong load bearing capacity. Specification: Item Type: Walker Wheels Material: Aluminum Alloy, Plastic Product Size: Wheel leg inner diameter: Approx. 2.5cm/0.98in, suitable for chair leg outer diameter less than 2.5cm walker applicable Product Use: Can be installed on the front leg of the elderly four legged walker, to realize the wheel leg interchangeable, the wheel is a universal wheel, to help the elderly walk more easily. Features: 5 gears height adjustment, aluminum alloy wheel legs, plastic wheels. Package List: 2 x Walker Wheels Note: Manual measurement, please allow some errors.