- Unique K-file has a ‘ file’ configuration in cross-section and it has non-standard ISO sizes-so-called ‘half-size’. - It helps to match the file to a specific clinical case. - Using Unique files helps to avoid steps during the root canal preparation. , available in size 12.5 to pave the canal before file 15 so decrease stress on file and decrease fracture possibility. - Size: 12.5. - Length: 25 mm. **For further product information, please contact Chat Support**