This is a single length, (48"), double twist Beef gut Pistoy style string made with beef serosa available with either a natural or varnish finish. Natural strings are hand-rubbed with a light oil. Varnished strings have three coats of finish before being hand polished with the oil. There is an additional charge for varnished strings. The string comes with plain, unknotted ends. Knots may be tied for you at an additional charge.