SS stands for Sport Slick, what more do you need!This Jagwire Sport Slick Gear Cable is die-extruded spiral-bound stainless steel for maximum performance. Because it's made of stainless steel it's corrosion resistant and performs in even the wettest and muddiest of conditions. An upgrade from basic cables, these galvanized and stainless steel strands are pre-stretched, then extruded through a die that removes the rough edges resulting in a smooth surface that reduces friction along the length of the cable.