- This Braun replacement head is compatible with all Series 9 generation electric shavers - Its Ultra-Thin Precision Blades shave closer and faster for a smooth, gentle finish every time - 5+1 shaving elements work in sync to cut tough beards for a flawless 0.00 mm close shave - Replace your shaver head every 18 months so you always get a shave of the highest quality - It's easy to change - simply click it onto your trimmer and you'll be looking your best in no time