Ernie Ball Hybrid Slinky Bass Strings are round-wound for maximum clarity and serious punch. Featuring a combination of Super Slinky and Regular Slinky gauges, the Hybrid Slinky set has proven to be a popular staple in music stores worldwide. Each bass string is manufactured with the finest and freshest raw materials in the beautiful Coachella Valley of Southern California. The list of endorsers for Ernie Ball Slinky bass strings reads like a who's who of top selling artists.