- Satelec Endo Retreatment Tip ET18D: Titanium Niobium With Diamond Coating. - The ultrasonic micro-oscillations transmitted from the handpiece to the tip generate perfectly linear movement. - Therefore the tip undergoes to-and-fro movements in the axis of the handpiece. - The active area of each tip is located on the distal 2-3 mm. - This working section may be applied on the surface to be treated, moving progressively from the crown to the root. **For further product information, please contact Chat Support**