Thomastik Acoustic Bass Acoustic Bass Guitar StringsThomastik Infeld's Acoustic Bass strings are ideal for acoustic bass guitars and piezoelectric equipped solid body basses. This set of strings are made with a phosphor bronze round wound winding around a nylon core. This combination produces a smooth, organic, and upright bass tone. The string gauges are as follows from high to low: AB344 . 041, . 053, . 068, . 086