Instrument Code Rings are:• Made of Silicone• Can be Cold Sterilized or Autoclaved.• Available In 8 Colors• 4.2 mm x 6.5 mm, Length 3.2 mm• Available in Boxes of 60• Small and Large Sizes to Fit Most Instrument Handles• Prepackaged in an Easy to Use Dispenser• System Dispenser Rack