- Gold speed Evo E4 (4:1) Endodontic use Specific for endodontics, gear ratio 4:1, can be heat-disinfected and sterilized in an autoclave. - Miniaturized head for improved access to the treatment area. Allows endodontic treatment in reciprocating mode and use of the apex locator integrated on Stern Weber dental units equipped with integrated endodontics. **For further product information, please contact Chat Support**