To assure proper note selection, scale is arranged in sequence and clearly marked by note notations on covers. Suitable for most music instruments' tuning basing on . It also can be used as an instrument to develop the children's pitch. Made of , sensitive and durable to use. Practical accessory for musician or music instructor. Features - Color: Silver. - Material: Metal, plastic. - Size: 6.40X6.40X1.00cm/2.52X2.52X0.39in. - Our 13 pitch pipe tuner is made of metal and and plastic material with fine machining, environmental friendly, sensitive, sturdy, anti-rust and durable. - To assure proper note selection, scale is arranged in sequence and clearly marked by note notations on covers. - With small body and carrying box, the pitch pipe tuner is easy and convenient to carry, and will not occupy too much your space. - This 13 pitch pipe tuner is suitable for most music instruments' tuning basing on . - It also can be used as an instrument to develop the children's pitch. Package list: 1 x Guitar Tuner (C-C) 1 x Guitar Tuner (F-F)