Korpa 
Electric Nickel Plated Steel with OPTIWEB Coating
The longest lasting tone night after night!
Elixir® 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.
Played for the same crisp tone as an uncoated string
OPTIWEB Coating provides a natural feel
Electric guitar strings constructed with nickel-plated steel wrap wire
Our coating technology protects against common corrosion and debris buildup, extending tone life longer than any other brand’s coated or uncoated strings*
Anti-Rust Plating on plain steel strings ensures longer tone life for the entire set
With less hassle and expense of frequent string changes, spend more time making music