Suitable for 1000 series models: 1735, 1775, 170, 180, 190, 5728 and other models can also be used for CruZer series models: CruZer3 CruZer4 CruZer5 Feature: Easy installation. Clean the machine before installation. Description: New knife replacement head with Microcomb "time saver" technology to capture and feed more hair to the cutting parts. New independent floating center trimmer that better adapts to facial contours. Change the parts of your shaver for even better shaving performance. On average over 18 months, and for a Braun shaver, it will cut an average of 6,000,000 hairs. As you perform this important task, the cutting parts will gradually wear out and your shave may become less close and more comfortable. We therefore recommend changing your shaver's foil block and blade every 18 months to maintain maximum performance of your shaver. For a perfect shave every day. Color: As shown Material: Stainless steel Package contents: 3 * Shaving accessories Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing . The measurement error is +/- 1-3cm.