Fits all MS3 Models: MS3-1000, MS3-1700, MS3-2000, MS3-2700, MS3-3000, MS3-3500, MS3-3700, MS3-4000, MS3-4500, MS3-4700, MS3-0004, RS8503, RS8966, RS8986, RS8943. Remington suggests that you change the foil every 6 months and the cutter every 12 months for best results.
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