Ukulele strings: This new generation of nylon material allows you to tune-to-pitch tension while minimizing string elongation. Offer a rich, amplified tone. Easy to install: labeling number 1, 2, 3, 4 to differentiate 4 strings, good gift for ukulele learner.Diameter: A-1st-.024, E-2nd-.032, C-3rd-.0.34, G-4th 0.28