Lexicon – exceptional quality with German-made precision technology. Exclusively from DENTSPLY Tulsa Dental Specialties, Lexicon is the name you know for endodontic innovation, convenience and excellent service. Stainless steel Exhibits strength and aggressive cutting ability with minimum opportunity for breakage due to a thick core Available in small files beginning with size 10 Silicone stopper and calibration rings Available in 21, 25 and 31 mm lengths