Please check your shaving head type number on the back of your shaver. Fits Precision Models: 100, 105, 150, 155, 205, 209, 255, 259, 1007, 1008, 1012, 1013, 1501, 1507, 1508, 1509, 1512, 2035, 2040, 2060, 2540, 2540S, 2560 Fits Types: 5459, 5461, 5462, 5463, 5464, 5596, 5597, 5608, 5609 5518?5523? 5524?5525?5614?5628?5629?5632?5634?5635 Fits Interface Models: 3773, 3770, 3105,3305?3310?3600?3610?3612?3614?3615?3731?3732?3733?3734?3775 Fits Types: 5629, 5634, 5447, 5449, 5629 5525,5614,5628,5632,5634,5635 Fits for Br-aun Pocket Twist shavers. Models/Types: 350, 370, 375, 5614, 5615, 5523, 5524 Fits Models:350,355, 550,555,570,575,P10,P40, P50,P60, P70, P80, P90 (type 5609), Cruzer Twist, PocketGo P50, 555, M30, M60,M60b,M60s, M90 BS550?BS555?BS570?BS575 and etc.Models/Types: 350, 370, 375, 5614, 5615, 5523, 5524 Fits Models:350,355, 550,555,570,575,P10,P40, P50,P60, P70, P80, P90 (type 5609), Cruzer Twist, PocketGo P50, 555, M30, M60,M60b,M60s, M90 BS550?BS555?BS570?BS575 and etc. Fits Interface Models: 3773, 3770, 3105,3305?3310?3600?3610?3612?3614?3615?3731?3732?3733?3734?3775 Fits Types: 5629, 5634, 5447, 5449, 5629 5525,5614,5628,5632,5634,5635 Fits for Br-aun Pocket Twist shavers. Fits Precision Models: 100, 105, 150, 155, 205, 209, 255, 259, 1007, 1008, 1012, 1013, 1501, 1507, 1508, 1509, 1512, 2035, 2040, 2060, 2540, 2540S, 2560 Fits Types: 5459, 5461, 5462, 5463, 5464, 5596, 5597, 5608, 5609 5518?5523? 5524?5525?5614?5628?5629?5632?5634?5635. Within 18 months, your shaver will cut an average of 6,000,000 hairs. In accomplishing this substantial task, the cutting parts will gradually wear out and your shave may become less close and comfortable. That's why recommends changing your shaver’s foil and cutter block every 18 months to maintain your shaver’s maximum performance. For an efficient shave every day.