Norelco Replacement Blades For 8151XL, 8150XL, 8140XL 9190XL, 9170XL, 9170XLCC, 9160XL, 9160XLCC, 8170XL, 8170XLCC, 8160XLCC, Heads Part Electric Shaver close shave. The flexing heads keep the shaving surface in close contact with your skin for a fast and efficient shave. Philips Norelco Replacement Heads provide a comfortable electric shave. These replacement heads offer three shaving tracks with a large surface area for a fast, TripleTrack heads with 3 shaving tracks cover 50 percent more skin surface at a time for a close and fast shave The replacement heads are equipped with the patented Super Lift and Cut System, which is designed to give you a close and comfortable shave as the first blade lifts while the second blade cuts comfortably below skin level