Kerly Kues Long Life Tempered Guitar Strings. Various Gauges

KERLY KUES 'CYCLECOAT'. Kerly strings are tempered strings. Normal strings are just that, normal. Coated strings use expensive coatings that try to extend the sound quality of a string. This process is debated by many and coatings do not make a string "feel real" or last longer regarding to breakage.

eBay