Easy to install. Clean the razor before installing. On average, a Braun shaver will cut approximately 6,000,000 hairs within 18 months. During this process, the cutting components gradually wear out, which may result in a less close and comfortable shave. It is recommended to replace the shaver's foil and cutter block every 18 months to maintain optimal performance. For a consistently close and comfortable shave. Please note: Due to different production batches, the actual product may have slight variations in color or appearance, which does not affect functionality. Compatible with: Model: 1, 110, 120, 130, 130s-1 & 815 Type 5683 Model: 130s-1, 140, 150, 150s-1 & 835 Type 5682, 5684 Model: 140, 150 & 150s-1 Type 5685 Color: Silver + Black Material: Metal Package Contents: 2 x Shaver Foil 2 x Cutter Head Note: Light reflection and differences in display screens may cause the color of the item in the image to vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.