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 industria Made from Duralin, a material known for its ideal combination of strength, grip, durability, and abrasion resistance 4 of every shape in the Duralin line which includes standard, wide, jazz, sharp, and gripped shapes Available in light, Medium, and Heavy