**PLEASE NOTE** These strings measure 36.75" / 93cm from the ball end to the start of the taper. These strings have no silk winding at either end of the string. Instrument: 4- String Bass Scale Length: Long Scale (Standard) Gauge Range: 55 - 110 Gauges: 55 , 75 , 90 , 110 Wrap Material: Cobalt Construction: Round Wound Hex Core / Round Core: Hex Core Standard / Double Ball End: Standard Ball End Coated / Non-Coated: Non-Coated Ernie Ball 4-String Cobalt Power Slinky Bass 55-75-90-110 Bass Strings 2731 RRP £47.95. Ernie Ball 2731 Cobalt Power Slinky Electric Bass Strings are round-wound for maximum clarity and serious punch. The Cobalt Series is clearly an improvement on its classic nickel-wound counterpart giving the player increased sustain, clarity and output. In addition, they resist sweat and moisture better and have unmatched flexibility when compared to other nickel wound strings. "Ernie Ball Cobalt Bass Strings are the new standard! Bigger, better tone, sustain and volume. Finally a real innovation with strings." - Randy Jackson "I can't believe how much low end I get out of Ernie Ball Cobalt Bass Strings. Also, the high end is super crisp, seemingly with more definition. Unbelievable." - Dave Larue All Ernie Ball strings are precision manufactured to the highest standards and the most exacting specs to assure consistency, optimum performance and long life. Made in the USA.