Jim Dunlop: Performance Is Everything. Dunlop was founded as a small, family-owned and operated company in 1965, and has since grown to be a leading manufacturer of electronic effects, picks, capos, slides, strings and other musical instrument accessories. From picks to pedals and every accessory in between, Dunlop Manufacturing has been creating world-class gear for musicians for over 50 years. The Dunlop Celluloid Guitar Picks Variety Pack Heavy is a pack of 12 Heavy Gauge guitar picks crafted from the highest quality celluloid. The High Quality Genuine Celluloid and the Precision Edges combine to deliver the best possible playing experience. Dunlop Guitar Picks are the picks that professionals rely on.