Easy to install. Clean the before installing. Within 18 months on average, a for 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. Therefore we recommends changing your shaver's foil & cutter block every 18 months to maintain your shaver's maximum performance. For a perfect shave every day. Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use 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 net 2 x cutter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.