DescriptionMade of colorful coated copper alloy.Long service life. Tunes stable, sounds great.Suitable for acoustic guitar. Make you guitar more perfect.Good tools to replace your guitar string, good gift for guitar beginner.Material: copper, with rustproof coating for durable use.Suit for: colored guitar strings are helpful for the guitar beginners to remember and practice.Specification:Item Name: Guitar Strings.Material: Steel, Copper Alloy.Quantity: 6 Pcs in 1 Set.String Length:E String (1st): 88cm(Approx.)B String (2nd): 88cm(Approx.)G String (3rd): 90cm (Approx.)D String (4th): 90cm(Approx.)A String (5th): 85cm(Approx.)E String (6th): 85cm(Approx.)6 Different Colorful Strings Standard:E String (1st) 0.28mm Stainless SteelB String (2nd) 0.38mm Stainless SteelG String (3rd) 0.61mm Red Bronze WoundD String (4th) 0.81mm Yellow Bronze WoundA String (5th) 1.07mm Blue Bronze WoundE String (6th) 1.32mm Green Bronze WoundNote:There might be a bit color distortions due to different computer resolutions.There might be size errors due to different computer resolutions.Package include:6/18 * Guitar Strings.