Perfect for beginners and children learning to play the piano, helping them become familiar with the keys and read sheet music more easily [Easy to Recognize]Large and thick letters, colorful design and transparent background easy to read and attract the attention of beginners. [No Glue Remains]Clean and adhesive can be applied and removed multiple times without leaving any residue or damaging the keyboard. [Easy to Install]Just cut the sticker with scissors and peel it off to place on the piano keyboard, lightly to secure them in place. []The letters are printed on the back of the transparent sticker, which resists constant finger impact and never fades. Waterproof and easy to clean with a damp cloth. Material: pvc colour: multicolor Package Contents: 10 x piano keyboard stickers 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.