John Pearse Phosphor Bronze Acoustic Guitar Strings 550SL Slightly Light 11-50

Extra Light 500XL - 10 14 23 30 39 47
Slightly Light 550SL - 11 15 22 30 40 50
Slightly Light Custom 570 - 11 15 22 30 42 52
Light 600L - 12 16 24 32 42 53
Light Medium Custom 640 - 12 15 23 32 42 55
Bluegrass 650 - 12 16 24 35 45 56
Medium 700M - 13 17 26 35 45 56
New Medium 710NM - 13 17 24 32 42 55
Medium Light 720ML - 13 18 22 32 42 52