Includes 100 mixed colors code rings which can be used to recognize and dental instrument, can be disinfected with instrument. 5mm inner diameter, fit most dental machine. Features: Made of silicone material, with high temperature resistance up to 135℃. Used to recognize and dental instrument, can be disinfected with instrument. 5mm inner diameter, fit most dental machine. Includes 100 mixed colors code rings. Small size, lightweight, easy to use. Specification: Item Type: Dental Code Rings Material: Silicone Color: Mixed Color Inner Diameter: approx. 5mm Package Weight: approx. 23g Quantity: 100Pcs/Box Package list: 1 x Box of 100Pcs Dental Code Rings