Ernie Ball Slinky Cobalt Flatwound Short Scale bass strings combine the smooth feel of traditional flatwounds with the power of cobalt. Featuring a cobalt ribbon wrap, cobalt under-wrap, and an optimal hex-core-to-wrap ratio, these new Flatwound Short Scale strings are the first flatwounds to offer the feel and tone of a roundwound. Designed for 30" to 30.5" scale basses, they are 48" long with a taper at 32.5". Gauges: .050, .070, .090, .110