FS: Used Spirocore Mittels w/ Long E This is the medium gauge set (Mittels) with the long E for extensions. ( Long Es cost and extra $50 new.) They are about 15 months old and have been played on moderately- 3-8 hours a week. I prefer brighter/newer strings on my dark bass for jazz playing but I know some players prefer broken in sets, especially for arco so I thought I would offer them up here. I've been asked by orchestral players in the past if I had any used Spiros. $125 shipped CONUS.