D'Andrea Shell Celluloid 355 Triangle Picks - One Dozen Purple 1.14 mm Shell Celluloid 355 Triangle Picks - One Dozen Purple 1 14 mm D'Andrea Formula Delrex guitar picks provide players with an alternative material that addresses the issue of pick slippage With a unique tone and articulation along with a matte finish, the Formula Delrex picks are a popular choice for all styles of guitar playing The 355 triangle picks are a popular choice for guitar players and bass players due to their larger gripping surface and tri-point design They are available in six gauge-specific colors and ship in a 12-piece pack