80/20 Copper Zinc alloy. The unique core-to-cover ratio combined with the specially tempered alloy delivers a bright tone with exceptional feel. The perfect sound for all your guitar explosions. GHS has made the highest quality strings since 1964. The choice of numerous guitar greats!
Gauges:
BB10U Ultra Light - 10 - 13.5 - 20 - 26 - 36 - 46
BB20X Extra Light - 11 - 14 - 22 - 30 - 38 - 50
BB30L Light - 12 - 16 - 24 - 32 - 42 - 54
BB40M Medium - 13 - 17 - 26 - 36 - 46 - 56
BB50H Heavy - 14 - 18 - 28 - 38 - 48 - 60
Strings by Manufacturer 
