Ernie Ball Beefy Slinky – Electric Bass Strings Ernie Ball Nickel Wound Electric Bass Strings are made from nickel plated steel wrapped around a hex shaped steel core wire. Each bass guitar string produces a bright, balanced tone and is manufactured with the finest and freshest raw materials in the beautiful Coachella Valley of Southern California. The perfect set if you want to tune your 4-string B-E-A-D instead of the regular tuning. 2840 Beefy Slinky: 65 80 100 130