Made of PVC, this product connects the labels in series, eliminating the need to stick individual labels on keys like traditional piano stickers. Easy to install and easy to remove without leaving residue, helping to keep your keyboard clean and tidy. Covers 61 keys and is universally compatible with all types of 61-key grand pianos, upright pianos, digital pianos, and keyboards. Displays the note of each key using a double staff design, aiding faster identification of keys based on standard treble and bass clef notation used in piano sheet music. No need to know key names or locate Middle C—simply place the note strip on the piano keyboard. Installation takes seconds. Once you become familiar with key positions and octave patterns, the note strip can be easily removed. Key count: 61 Material: PVC Color: Black + white Package includes: 1 x Piano Notes Guide Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual product. Measurement may vary by 1-3 cm.