Ernie Ball Regular Slinky Bass Strings are round-wound for maximum clarity and serious punch. 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. All Ernie Ball strings have hermetically sealed foil packaging that defends your strings from humidity, ensuring fresh tone as if they had been made just for you in the USA. All insert labels are made from 100% recycled materials.