To replace some chair feet protectors I've designed these textured 16mm TPU caps.

They've an opening of 16mm (about 0.63 inch) and a little texture on the bottom. Without any load they mainly protect the chair legs from damages but won't prevent any slipping. TPU is too smooth for that. But as soon as a person sits or leans onto the chair the small textures will compress and they turn into some sort of anti-slip feature.

Some general info about printing TPU:

• Keep the filament dry, as TPU absorbs moisture easily
• TPU sticks heavily to the build plate. So please avoid printing it on a textured plate and make sure to apply some glue stick to have it as a separation layer
• feed TPU from an external spool. It's not recommended to use it in the AMS