The D'Addario 1DBU5-10 is a 10-pack of medium/heavy Duralin picks.

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 are known for their bright "licking sound when hitting strings and are preferred by many soloists for their clear articulation on fast single note passages.
100 picks per package
Medium Heavy gauge (Blue; 1.0mm) works well for both strumming and articulate picking
Standard shape for comfortable playing
Made from Duralin, a material known for its ideal combination of strength, grip, durability and abrasion resistance
D'Addario branded pick packaging is designed for minimal waste and environmental impact