1. **Reusable and Transparent** Made of high - quality PVC environmental protection materials, the transparent effect is like printing directly on the piano keys. It can be removed without leaving any 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 most 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 help children or beginners get familiar with the keyboard faster, greatly improving the practice efficiency. 4. **Easy to Install and Thinner Material** Two guiding marks in the upper - right and lower - right corners can help you complete the installation within a few minutes. Fansjoy piano key stickers are 50% thinner than ordinary stickers, and you can hardly feel their existence. 5. **Customer Satisfaction Guaranteed** Customer satisfaction is our top priority. If you are not satisfied with our products, we will provide assistance at any time.