MAGMA ULTRA FLAT Bass strings are wounded and flattened with stainless steel. This process provides higher volume and brilliance than the traditional flat strings and the soft and smooth surface eliminates the finger noise and squeaks. Besides, the duration of these ULTRA FLAT strings is higher than the duration of the traditional strings. Available for basses of 4, 5 and 6 strings and in .040, 0.45 and 0.50