Dean Markley Signature Series Vintage Bronze Acoustic Guitar Strings. More power, tone, sustain and durability. 10-48 XL - 10, 14,24, 30, 38, 48. 11-46 LT - 11, 14, 22, 30, 36, 46. 11-52 TLT - 11, 15, 24, 32, 42, 52. 12-54 ML - 12, 15, 25, 34, 44, 54. 13-56 TMD - 13, 17, 26, 36, 46, 56. 13-58 MED - 13, 17, 26, 38, 48, 58.