The Ernie Ball 7 String Regular Slinky electric guitar strings are the ideal match for the 7 string player that likes brilliant playability. They're tight, responsive and dynamic! If you're playing metal then these will give you that powerful tone that you need but at the same time will let you make huge bends and crazy vibrato! Down tune your guitar and these will play fantastically! These are Nickel wound and will produce a nice, bright and balanced tone.The individual thicknesses are: 10, 13, 17, 26, 36, 46, 56. They're also for sale with FREE next day UK delivery so get rocking in no time!