The costly stainless steel wrap wire used to manufacture Bootzillas™ is unique. It produces a distinct “crunchy tone”. Bootzillas™ bass strings are coated for extra protection against damaging substances such as perspiration, dirt, humidity and “acid hands”. Scale Length: 37 3/4". Material: Stainless Steel Treated with Superior K3™ Coating. Hexagonal Core Wire with Ball End. Gauges: 45, 65, 85, 105, 125.