Wow these are just a little plastic Nubs but man they work great. Make sure you check the measurements so that they fit your application. I had misplaced some of these for a glass-top table and needed to get Replacements and this fit the bill perfectly and left me with a large Surplus. However they are so nice that I use them on several cabinet doors to prevent slamming and they work great. Just be sure to put them away so that they don't get into any small children's Airways as they certainly represent a choking hazard. I am pretty sure they are not radiolucent so they would be hard to find on me X-ray when you take them to the emergency room. Be sure to tell the doctor what you believe it is and bring a sample. They have to be able to be retrieved pretty easily given that they're soft but to be clear this is not something that you want to try at home on your workbench!