JCraft Regular Light 4-String Electric Bass Guitar String 45-105JCraft Bass Strings are built in special gauges to deliver the right tension for the discerning bassist. They are made with the timeless combination of hexagonal core wrapped in nickel alloy for the best tone and durability. The regular light is a standard gauge bass string perfect for standard tuning and variety of playing styles 1st String: 0. 045 2nd String: 0. 065 3rd String: 0. 085 4th String: 0. 105 For heavy gauges, try the JCraft X Heavy Core