These 3 Peg Display Stands are injection molded from clear acrylic plastic. Stands will have a mark on the side with the single front leg, as this is the result from when they break away from the mold. There are indentations on the bottom of the two back legs which may look like an air pocket. This is just how the mold is made and unavoidable. Our Vinyl Anti-Scratch Guard covers are for you to place of the top of each peg. We have found these covers/guards a great way to prevent your item from slipping and scratching on the stands. The guards were also designed to keep your displayed item more stable.