Product was exact replacement for more expensive items in stores. Mother prefers these exact glides because they work better than some of the newer replacement options. The glides that only press in (newer type) often move off center causing her walker to unexpectedly jerk when the straight edge of the glide hits a sidewalk crack. These do not suffer that problem. I purchased a few pairs. I see sellout risk is now moderate. I will have to get a few more. Delivery was lightning fast and items were well packaged.