Features: The piano grid is made of non-toxic and environmentally friendly ABS resin material, and the mouthpiece is round and does not hurt the mouth. This harp is fixed with multiple screws for securing the cover, which makes the overall structure stronger and ensures the airtightness of the harp. The sound quality is more stable and natural, beautiful and strong, the tone is natural and pure, and the playing is labor-saving. High-quality phosphor bronze sound spring, anti-corrosion, anti-fatigue, great resonance effect, bright and full timbre. This harp cover is marked with hole position, which is convenient for beginners to find the correct note position. This harp is not easy to age, which makes the whole harp playing more stable and labor-saving. Specifications: Material: Stainless Steel + ABS Color: Black / Golden / Silver Package Weight: approx. 180g 4 Types are available as shown in the picture. Size: approx. 210 x 30 x 24mm / 8.27 x 1.18 x 0.94in Package Includes: 1 Piece Harmonica Note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before purchasing. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!