Shell Classics CELLULOID Guitar Pick, medium. Jim Dunlop Gels are molded of unique custom formulated polycarbonate composition that provides superior tone, playability, and wear. The Gels' engineered tip and beveled edges combine for a superior positive attack and an excellent smooth string release. Each gauge in the pack is a hip translucent color. Choose Kiss the Sky Blue/light, Electric Lady Lime/medium light, Purple Haze/medium, Red House Red/heavy or Woodstock Yellow/extra heavy.