Dean Markley 2552 Blue Steel Light Electric Guitar Strings — 9-42Last up to 3X longer - Amazing Tone - Effortless Feel - High Output - Great Sustain. Cryogenically treated to enhance tone and feel while creating a longer lasting and more durable string. The cryogenic process removes transient material that produces harsh highs and muddy lows that kill the sound and life of your string. Made of 8% nickel-plated steel outer wrap on tinned Mandolin wire hex-core, Blue Steel strings have been best sellers worldwide for over 30 years and are used b