Feature: 1. It is helpful for beginners to understand the keys and deepen the impression 2. It is helpful for beginners to quickly grasp the basic principles of piano 3. It is very helpful for children to learn the keys, to read the notation and notation. Specifications: Name: New Colorful transparent piano stickers Model : X- 0 1 ZD Material: Transparent PVC Applicable: 37/49/61/88 keys Use: Transparent, clear, sticky, no glue Note: 1. Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks 2.If you have big quantity , please feel free to contact me, I will give you best discount, thanks Package Included: 1 new colorful piano key sticker