Universal Top Weight and Stopper for Most Sticker Tattoo Trading Card Machines
These are compatible with the vast majority of flat vending machines. Verify dimensions with your machine before purchasing: 4" Deep x 3" Wide and the stopper is offset 1/2" from the end.
For a flat vend machine that vends stickers, tattoos, cards, etc to function properly, you must have a weight on the top of each column to hold the product down. It also serves as a stopper so that when your column empties, the customers can't put in more money.