My clothes dryer/airer lost its original feet protectors and I found the sharp edges of the metal were digging into our new carpet. As it's always setup in the same place I was worried it would very soon wear a hole, so I designed these feet for it.
They have a large 35mm base to prevent it from sinking into the carpet. They have a hole that will accept up to a 12mm bar size.
If your bar is very slightly smaller, a few wraps of electrical tape around the end will allow you to achieve the perfect fit.
I would highly recommend printing in TPU to allow a small amount of flexibility to ensure you are able to get them on.
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I do have a smaller size available here: https://makerworld.com/en/models/57792#profileId-59505
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