This tailpiece features a high-precision molded carbon composite design for a lightweight tailpiece with added strength. This specially designed lightweight design offers improved resonance for your instrument. The four integrated fine tuners feature fine-threaded screws for smooth and precise tuning. The Otto Musica Carbon Composite Violin Tailpiece includes a braided steel tail gut for added strength and worry-free durability and is available in black finish in five sizes to fit 4/4 thru 1/8-size instruments.