Hunag Harmonica 10 Tone 20 Holes Diatonic Blue Harmonica Key of A A Key.Golden color,Harmonica Size is about 105 x 30 x 20mm. Phosphor bronze reeds are resilient and provide a smoother tone. Comb is made of resin which is durable and immediately responsive. Bottom is using discrete support design , resonance space is large. Each harmonica comes with a case and a piece of cloth to keep harmonica safe and clean.