Reusable and TransparentMade of high quality eco-friendly PVC, transparent as printed on the keys, removable but won't leave glue marks or damage your keyboard Thoughtful UniversalIncluding 52 white color stickers and 36 black notes, a total of 88 stickers Banger keyboard stickers for most pianos include 37/49/54/61/88 keys Clear PrintingPiano keys are marked under the top layer to prevent ink fading; bigger and more colorful bold letters and sticks help kids or beginners learn keyboard faster and greatly improve the efficiency of practice Easy to Install and Thinner MaterialThe 2 rails on the top right and bottom right can help you install them in minutes Piano key stickers are 50% thinner than normal stickers You barely feel their presence