The Stander Replacement 6-inch Walker Wheels are made of a smooth wear resistant rubber that will allow you to roll smoothly over any surface. These replacement wheels work with the Stander EZ Fold-N-Go Walker and Rollator, the Able Life Space Saver Walker and Rollator, and the Signature Life Walker and Rollator; compatibility with other walkers and rollators not guaranteed. For assistance with replacing your old walker wheels, please see our Walker Replacement Wheels Installation Instructions video provided on the product page.