The piano keyboard stickers,no glue,easy Integral installation.You can easily remove it once you are comfortable with the location of the keys.Prevent piano stickers and permanent piano key marks as it slows the learning process over the long run for the beginners. Each keyboard notes on the piano stickers for keys removable are color coded to help identify and memories easily.and the larger letter easier to recognize for kids and beginners to solve the problems that small letters are in playing. Find the Middle C key marked on the piano key labels to correspond the same key on the piano, and then flatten the keyboard notes overlay. The piano keyboard stickers are good teaching tool and wonderful gifts for kids and beginners.Comes with a case,easy to carry. Function: learn piano and learn notation Applicable musical instruments: grand piano, upright piano, electric piano size: 88 KEY: 122cm Material: PVC colour: multicolor Package Contents: 1 x Piano Sticker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.