1. Acrylic 2. ANTI FALLING BAFFLE:Designed with 2 removable stop inserts on the nail polish rack ends to keep bottles from falling out the sides of acrylic shelf 3. EASY TO ACCESS:The see-through invisible wall mount nail polish shelves not only allow you to display your favorite nail polish and its brand but also to find the colors and bottles you want easily and make your dressing table no longer messy,What a space saving wall organizer it is 4. SIZE:15x1.6x2(LxWxH) incheach,5mm thickness.The inner diameter of the acrylic shelf is 1.25 inches.( Please confirm that the bottle diameter is not greater than 1.25 inches before purchase)package include 4 pieces of acrylic nail polish racks and install hardware,Holds up to 45-60 bottles of nail polish (actual number may vary based on size and shape of bottles), each wall floating shelf is individual, It can be installed in a row or separately according to your preference 5. MULTI-FUNCTION:The floating shelves are for nail polish, essential oil,,lipstick,dressing-brush,liquid foundation also can be used as wall bookshelf in room.No matter display your collection at home, nail salon, nail business, retail or be an gift for girls, ,wives and mothers ,all are great choice