Pack of 12 replacement filing heads New design is easier to replace For best results, replace when filing heads appear worn Compatible with all PediPaws including old black rubber system, sold separately Product Description PediPaws Replacement Filing Heads - Now you can be sure that each use of your PediPaws will be fast and easy, with a precision filing surface. These filing heads include our new design, for easier replacement. They are compatible with all PediPaws units, sold separately, including the older black rubber system. PediPaws Replacement Filing Heads are offered in a pack of 12.For best results replace the filing head when it appears worn, or when it becomes more difficult to file your pet's nails. A new filing head will ensure a faster and more comfortable nail filing session for you and your pet.. All Our Merchandise Pet / Smoke Free Enviroment Check out my other items! Be sure to add me to your favorites list!