CCYKXA 16Pcs (22mm) - All Sizes - Round Tube Domed Inserts End Caps Plugs for Table Chair Furniture Legs

Used to inexpensively "finish" the tubes of a swim ladder and a gangway handrail, which are therefore subject to very little mechanical stress. Good geometry and good hold in the tube, but the material (presumably a basic PP) seems a bit cheap to me for the "chair leg" application.

The chair legs were slightly thinner but I managed to cut them a little at the level of the fins