Superior Bassworks STANDARD Upright Double Bass Strings Blood Red Color FULL SET Perfect strings for Rockabilly, Bluegrass, Psychobilly, Country/Western, and more! Fits most 1/2, 5/8, 3/4, 7/8, and 4/4 scale basses. 6 string options included in every pack. .170, .155, .130, .105, .095, .080 (sizes in inches) 100% "synthetic gut" - nylon/kevlar construction to simulate the tone and feel of natural gut strings. Please read the full item description below for even more information about this product.