Thicken Copper plate,1mm copper plate makes the harmonica sound more clear and melodious. harmonica Cover design:thicken copper cover,fine printing design with enough hardness,it is not easy to deform with long time playing. harmonica use High quality ABS resin frets.Use Food grade ABS innocuity engineering resins frets,Waterproof and healthy. Phosphor bronze , resistance, aging is not easy to fall off and make the harmonica sound more beautiful . Stainless steel screws, -, waterproof and strong, not easy to rust. Model: T008K The crowd: General Number of holes: 10 holes Harmonica Category: Blues / diatonic Applicable scene: professional and semi-professional student travel portable exercise performance size:100*28*18mm Material:ABS+ metal colour:blue Package Contents: 1 * Harmonica 1 * Plastic Box 1 * Clean Cloth Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.