Product Description Ernie Ball nickel wound 6-string Baritone electric bass Strings are made from nickel plated steel wrapped around a hex shaped steel core wire. The plain strings are made of specially Tempered tin plated high carbon steel. Each bass guitar string produces a bright, balanced tone and manufactured with small ball ends like guitar strings, not large ball ends used on traditional electric bass stings. These sets are optimal for a-a or b-b tuning combinations and are a perfect match for hybrid Baritone instruments. Gauges . 013, . 018P, . 030, . 044, . 056, . 072. From the Manufacturer These Slinkys are designed for baritone guitars and utilize small ball ends like guitar strings, not large ball ends used on traditonal electric bass stings. These sets are optimal for A-A or B-B tuning combinations and are a perfect match for hybrid baritone instruments. Gauges .013, .018p, .030, .044, .056, .072