I change my strings like my underwear...one makes sense the other not so much. Each set has life left...don't gig and play occasionally at home. All are (4) string sets off of my Sadowsky 34" scale 4 string. Two are Sadowsky blue label, stainless and nickel , 040 thru .100 & .045 thru .105, 2 are Dunlop, stainless and nickel, the newer more flexible string, both .040 thru .100 and a set of D'addario's. Paypal ok.