GHS Strings M3050 4-String Precision Flatwound, Stainless Steel Flat Wound Bass Strings, Long Scale Plus (.045-.105) Model: M3050 Flatwound Stainless Steel on a Hex Core Unique cross-winding process offers a deep percussive tone. Polished Stainless Steel Flat Wire Wrap Medium Gauge: 045-065-085-105