Check the listing for details. 10 Duralin Guitar Picks Extra Heavy 1.5mm 1DBK7-10 D'Addario Planet Waves. Color: Black, Condition: New. Listed at 6.95 USD. D'Addario Planet Waves Duralin Guitar Picks 1.5mm Extra Heavy 10 pack 1DBK7-10 Duralin (also known as Acetyl or Delrin) is a unique material with an extraordinary combination of strength, stiffness, dimensional stability, fatigue resistance, and low friction. Normally used as a replacement for metal bushings and bearings in industrial applications, this extremely durable polymer is ideal for picks. Duralin picks allow an artist to highlight the bright clicking sound of the pick hitting the strings when playing acoustic, rhythm guitar, and fast single note passages. D'Adddario features one of the widest range of guitar picks in the industry. With various material choices to find the tone you are looking for, to the various shapes to fit your comfort needs, D'Addario has the pick for you. Look no further.D'Addario is known for innovative, problem-solving, quality musical accessories offering a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more. AUTHORIZED DEALER Check Out Our EBAY Store for Your Guitar String, Tuner, Cable, Setup Needs