1. Reusable and Transparent Made of PVC environmental protection materials, the transparent effect is similar to printing directly on the piano keys. It can be removed without leaving glue marks or damaging your keyboard. 2. Universal and Thoughtful It includes 52 colored stickers for white keys and 36 note stickers for black keys, a total of 88 stickers. Fansjoy keyboard stickers are suitable for many pianos, including 49 - key, 54 - key, 61 - key and 88 - key pianos. 3. Clear and Eye - catching The piano key labels are printed under the top layer to prevent the ink from fading. The large black letters and bold staffs can help children or beginners get familiar with the keyboard more quickly, improving the practice efficiency. 4. Easy to Install and Thinner Material Two guiding marks in the upper - right and lower - right corners can assist you in completing the installation within a few minutes. Fansjoy piano key stickers are thinner than ordinary stickers, and you can hardly feel their presence. 5. Customer Satisfaction Guaranteed Customer satisfaction is a priority for us. If you are not satisfied with our products, we will offer assistance at any time.