dental k file CE approved fast shipping , best service 6pcs/ box,4 types length exported to more than 50 countries dental k files NiTi K-filesStrong and extremely flexibleDiamond-shaped cross sectionHand Use Silicone stops .02 Taper Length: 21mm, 25mm, 28mm, 31mmPacked 6 pcs to a box, Assorted package 15-40, 45-80InstrumentSizeColour DesignationNiTi K-Files 8 Grey 10 Purple 15 White 20 Yellow 25 ...