This is a 12-pack of 3 string sets voiced specifically for an electric 3-string cigar box guitar (CBG) with a magnetic pickup, that you want to tune in "Open G" (G-B-D)" or "Standard" (G-B-E, same as the 3 highest-pitched strings on a 6-string guitar). Open G is a great setup for slide (fretless) playing, and the standard guitar tuning is great for a fretted instrument - you can play the "top" portion of most guitar chords with just a couple of fingers! These are medium-gauge strings, meant for guitars that are going to be played more heavily or from which you want a stronger sound. For best results with reaching the desired tuning, these should be used on a CBG that has a scale length (the length from the nut to the bridge) in the 24-26" range. Much longer or shorter than that and the strings will either be too loose and sloppy, or so tight that they break before they reach the pitch. #1 - .026" Nickel Wound #2 - .017" Plain Steel #3 - .013" Plain Steel For best results with reaching the desired tuning, these should be used on a CBG that has a scale length (the length from the nut to the bridge) in the 24-26" range. Much longer or shorter than that and the strings will either be too loose and sloppy, or so tight that they break before they reach the pitch. These string sets are formulated based on our own experimentation and what has worked on our own guitars. If you want to hand-pick specific strings in specific sizes, this may not be the pack for you. But if you are not sure exactly what you need and want a set of inexpensive strings that should work just fine for your build, this is the ticket. Please note that these strings are intended for an ELECTRIC CBG with a magnetic pickup. For an acoustic CBG or one with a piezo pickup, please see our acoustic string sets.