b'SLINKY M-STEELThe loudest, most expressive strings ever created providing increased output, frequency response, and strength. M-Steel, short for maraging steel, is a superalloy used in high stress applications for the aerospace and defense industries. The wound strings are comprised of a patented Super Cobalt alloy wrapped around a maraging steel hex core wire, producing a richer and fuller tone with powerful low end response. M-Steel plain strings are comprised of a specially tempered steel for maximum fatigue resistance. A patented winding of steel around the ball end of the plain strings reduces slippage, breakage and stays in tune better than conventional plain strings.TONE PROFILEOutputTrebleMidBass10-46 | P02921 9-42| P02923 9-46 | P02922 11-48 | P02920 10-52 | P02915SLINKY RPS NICKEL WOUNDA patented winding of brass wire is tightly wrapped around the lock twist of the ball end of the plain strings. String slippage and breakage are minimized at the ball end where these most often occur. Plain strings in RPS sets last longer and stay in tune better than conventional plain strings. Ernie Balls RPS wound strings consists of specific gauges and core to wrap ratios for balanced rich harmonics and that signature Slinky feel. Ernie Ball Slinky gauge combinations, todays industry standard, were pioneered by our founder Ernie Ball more than 50 years ago, helping shape the sound of rocknroll.TONE PROFILEOutputTrebleMidBass10-46 | P02240 9-42 | P02239 9-46 | P02241 11-48 | P02242 8-38 | P02238Ernie Ball - 2020 Product Catalog 13'