Item Type: Thumb Piano SetMaterial: Acrylic, metalPackage List1 x 17 Key Thumb Piano Set1Accurate Tuning: Dial each key to test the intonation while making, adjust the pitch downward, adjust the low pitch upward, each instrument is carefully tuned. 2Professional and Practical: Our 17 key thumb piano is very professional and practical, and can bring a fun experience to your playing and entertainment. 3Charming Appearance: Our 17 key thumb piano has a charming and cute appearance that your family and kids will enjoy, making it a great holiday gift for them. 4Metal Keys: The thumb piano keys are made of metal, with significantly longer vibrations, longer sustaining, and distinct echoes. 5Acrylic Material: The thumb piano is made of acrylic material, with high hardness, stable structure, and not easy to wear and run the sound.