Rotosound R9-2 2-Pack Struny pro elektrickou kytaru

they stretch real quick(+), stays in tune well(+), a little too stiff for my liking(-); my biggest issue is the packaging, if you open it you either put the 2nd set in a sealed container or put it on a different guitar. Both sets are combined into one packaging, nothing separating them(-). They sound good with and without an amp, no additional E string like when buying a single set