Length: 21 mm, 25 mm. 
SIZE: SX, S1, S2, F1, F2, F3 

Features: 
Made of high quality medical NITI ALLOY. 
High quality cutting efficiency and fracture resistance. 
Progressive taper design improves flexibility and cutting efficiency, especially in tighter or more curved canals 
With fixed plastic washer and handle 
Maximum temperature of sterilization is 150 degree. 
Packed with 6 files/box, available for single and assorted sizes.