Rings 2.167P & 2.167M are produced from nitinol (nickel titanium alloy) NiTi Rings are characterized by: .- optimal matching of the contour of the ring working part to the tooth surface.- unique ability to return to its original shape after any opening.- high clamping force throughout the service life Works with Forceps number 1.099-3 WARNING!!!When operating with ring:1) make sure of the integrity of the ring and absence of rust on it; 2) avoid high-speed opening;3) open the ring for not more than 10 - 12 mm width ;4) open the ring for necessary width outside the mouth before placing it on a tooth. CLEANING AND STERILISATION INSTRUCTIONS Recommended to use Dry-heat sterilization process 1) Submerge instruments in cleaning agent solution with neutral pH for 20 min; 2) Rinse the instruments thoroughly with purified water for 3-5 min;3) Perform standard moist heat/steam sterilization procedure following the sterilizer instructions WARNING!!!1) Do not use cleaning agents with a high percentage of chlorine and cleaners containing oxalic acid; 2) Do not keep instruments in liquid medium for more than 3 hours