Rogue P9 Bulk 12 Pack 009 Plain Steel Electric Guitar Strings 12-PackSolid steel stringsGauge .009 009, Plain Steel - Acoustic or ElectricThese are the same guitar strings Rogue uses in prepackaged retail sets What's the difference? We package 12 strings of the same gauge in airtight vinyl bags with a packet of silica gel to protect against unwanted moisture, so they last longer than typical string sets We also pack these bulk strings in big, loose coils to avoid compressing or stretching the windings, so they sound better than tightly coiled strings Rogue Strings are made for us exclusively by a famous manufacturer, employing the finest materials and the latest manufacturing methods