Maintain the performance of your Andis Pro foil professional shaver with the 17130 replacement foil and cutters. It is recommended that the foil and cutters be replaced every 18-months to enjoy optimal performance. The replacement foils are made of real titanium for longer lasting performance and feature enlarged holes that provide a close, smooth shave. The foil and cutters are easy to replace as well as easy to remove for cleaning and regular maintenance. The replacement foil and cutters will help preserve the life of your Profoil shaver.