Cello inexpensive wood that has been blackened or "ebonized" to look like ebony, which is much harder and more expensive. Ebonised parts such as tuning pegs may crack or split, and the black surface of the fingerboard will eventually wear down to reveal the lighter wood underneath. Historically, cello strings had cores made out of catgut, which, despite its name is made from sheep or goat intestines which are dried out. Most modern strings used in the 2010s are wound with metallic materials like aluminum, titanium and chromium. Cellists may mix different types of strings on their instruments. The pitches of
Pena (musical instrument) is also tied to the instrument tail. The bow is wooden and bears a curved flourish at one end which is made of metal. In some parts, the bow also features tiny metal bells. The string is traditionally made of horse hair but, sometimes, metal strings and strings made out of wood fiber are also used. Pena (musical instrument) ꯄꯦꯅꯥ(Pena) , also known as "Tingtelia" in Tangkhul Language is a mono string instrument falling in the lute category, similar to some of the traditional Indian stringed musical instruments such as Ravanahatha, "Ubo" or the "Kenda", found in various parts of