Push-on rubber face.
THO612SF - soft red rubber face - will not mark white wood.
THO612HF - hard black rubber face.
Diameter: 40mm (1.1/2in).
Softer red grade which will not mark white wood.
Diameter: 40mm (1 1/2in).
Loads more than in a shop, and without needing to navigate all the aisles
Whichever suits you best
Like Macgyver but online