Feature 1UPGRADE 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. 2UNIVERSAL WHEELS: Plastic wheels with universal rotation, suitable for tile, concrete, wood, carpet and other surfaces, won't leave marks or scratch the floor. 3EASY 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. 4ADJUSTABLE HEIGHT: Seniors walker wheels are height adjustable, support 5 gears height adjustable, with locking fixed hole diameter, stable and reliable use. 5STABLE AND DURABLE: This walker caster wheel is made of premium aluminum alloy legs, sturdy and durable, no deformation, strong load bearing capacity.Item Type: Walker WheelsMaterial: Aluminum Alloy, PlasticProduct Size: Wheel leg inner diameter: Approx. 2.5cm/0.98in, suitable for chair leg outer diameter less than 2.5cm walker applicableProduct 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 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x WalkerWheelsNoteManual measurement, please allow some errors.