Medium strings for fivestring electric bassguitar. Stainless Steel alloy has an inherent bright and cutting timbre to it. It gives a Bass String an unforgettable “stainless” tone. Something you need to play to really understand. Blue Steel Bass is a Stainless string. So if you’ve played them, you are close to knowing what Helix SS Bass would basically sound like. Features set of five strings. String size: .050 / .070 / .085 / .105. / .128.