Parametric foot for walker/cane/crutches/pole

This is a foot originally for a walker. It's parametric so you can adjust it's dimensions to fit any pole. so maybe a crutch or a cane or something. we printed in a stiffer TPU and the traction is good but not great. better than the plastic skids the walker had. but not as good as new rubber for a crutch. a softer TPU may do better.

Update: added numerous size permutations. in case you're too busy to customize.

Update: added internal structure to foot so that slicers will put more walls there for better support.