UnoDent Professional Stainless Steel K File 25mm Size 2 An essential for successful Endodontic Treatment. K files are used for shaping and cleaning canals with a square cross section. • Contains 6 Files per pack • Size: 20, • Length 25mm • Material: Stainless Steel, • Colour: Yellow Handle. • Standard Taper 2% (0.02). The files should be sterilised between 134-137° for a minimum of 3 minutes before use.