Review on 🛠️ Set of 120 Soft Rubber Feet with Stainless Steel Screws - 0.31 x 0.59 (HD) - Non-Slip, Non-Marking, Anti-Skid Grips for Furniture, Electronics, and Appliances by Rob Bishop

This is excellent value for money. They are made of soft PP or TPO with a small amount of rubber. They're not flimsy, but they're not hard plastic either, with moderate grip on a smooth tabletop. The screws have a flat head which is way better than what others are suggesting. The only potential problem if you're worried about looks. Some dividing lines and weights are visible, there is no texture. If you're looking for a quality bumper because you sell expensive cutting boards, these may not suit you. But I'm also biased because I make a living from an engineer molding plastic and rubber.