Elixir Optiweb 19002 Nickle PLated Steel .009-.042. Electric Nickel Plated Steel Strings with OPTIWEB Coating give you the performance of a natural string — that crisp tone, natural feel and playable grip you know and love—without sacrificing the signature long-lasting tone life of Elixir Strings. • MFSKU 19002 • UPC 733132190027