If you're looking for a great sounding set of guitar strings, look no further than these Coated Super Light Guitar Strings from Monoprice!These strings are made of coated steel, for the E and B strings, while the larger strings are composed of an hexagonal core wrapped with coated nickel alloy wire. They include a rust-resistant coating and gold plated ball ends.SpecificationsE - 1st Coated Steel .009 (0.23mm)B - 2nd Coated Steel .011 (0.28mm)G - 3rd Nickel Alloy Wound .016 (0.41mm)D - 4th Nickel Alloy Wound .024 (0.61mm)A - 5th Nickel Alloy Wound .032 (0.81mm)E - 6th Nickel Alloy Wound .042 (1.07mm)*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***