K Files Beutelrock Art 63 - Pack of 6 Size 25 mm. For all preparation techniques with a filing motion             Stainless steel                      ISO 06-25 square cross-section for better fracture resistance                      ISO 30-140 triangular cross-section for better cutting efficiency                              Instrument type and ISO size are clearly marked on the handle                                           Special steel alloy with uniform structure for maximum resistance to fracture and maximum flexibility                        Radiopaque depth marks                   The inactive tip conducts the instrument safely along the canal                       With pre-mounted silicone stoppers                    Blister of 6 pieces.