**PLEASE NOTE** These strings measure 37" / 94cm from the ball end to the start of the silk winding. These strings have Red Silk at both ends of the string.Unsure what scale length string you need?  Click here!Instrument4- String BassScale LengthLong Scale (Standard)Gauge Range40 - 100Gauges40 , 60 , 80 , 100Wrap MaterialStainless SteelConstructionRound WoundHex Core / Round CoreHex CoreStandard / Double Ball EndStandard Ball EndCoated / Non-CoatedNon-CoatedRotosound SM66 4-String Swing Bass Stainless Steel Roundwound Bass Guitar Strings 40-100 Long ScaleThe most popular Roundwound bass string ever. Rotosound was the first string company to produce this kind of string. Introduced in 1962 it changed the sound of the instrument instantly. The favourite string of many players including Billy Sheehan, John Paul Jones and Geddy Lee.The steel used to produce these strings is unique, combined with a highly secretive manufacturing process.**PLEASE NOTE** These are Long Scale Strings.The string measures 37 inches from the ball end to the start of the silk covering. N.B. These strings have silk at both ends.Gauge SM66 - 40, 60, 80, 100.Made in the UKCode: SM66