This set of 4 strings includes No 7 - B or 1st, No 8 - F# or 2nd, No 9 - D or 3rd, No 10 - A or 4th. I don't know anything about strings.
Vintage Senorita No 11 Ukulele Nylon Strings Set #7-10 USA E&O Mari Inc LaBellaN
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4pcs/set Replacement Ukulele Strings Nylon Strings For 21 / 23 / 26 inch Ukulele
