Features: - Dental instruments endodontic reciprocating endo rotary files single files. - Operation type: Engine use. - Made of M-wire NiTi alloy, excellent fracture resistance. - One files system, reciprocating motion. - S-shaped cross-section allows better cutting performance. - Make root canal treatment more efficient and time-saving. - Recommended rotary speed of engine files is 250~400RPM. Specifications: - Size: #40. - Taper: 6%. - Length: 25 mm. - Color: Gold. **For further product information, please contact Chat Support**