40-100 Medium Light Bass String pack from Warwick. This Warwick Medium Light Red String pack 40-100 is for 4-string basses. The set consists of 040″ .060″ .080″ .100″ sizes. These stainless steel roundwounds are computer designed long lasting great sounding and well priced. These Warwick bass strings boast carefully chosen materials. The adjustment of core and winding wire give an even tension well balanced overtone responses as well as an even magnetic response when being picked up.