The PathFile system comprises 3 rotary NiTi instruments, available in lengths 21mm or 25mm.... 1 PACK OF 6 per order                                                                                                                                                                                                                                                                                                                              Files:With increased flexibility and more resistance to cyclic fatigue, these files offer many advantages over manual stainless steel files:Less canal transportation than with manual K-filesSuitable for curved canalsMore flexible than K-filesFaster instrumentation time than with manual K-filesOriginal canal anatomy is better preservedThe sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item. The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item.