Easy to install. Clean the sooner than installing. Compatible With: Model: 1 a hundred and ten one hundred and twenty 130, 130s-1 & 815 Type 5683. Model: 130s-1, 140, 150, 150s-1 & 835 Type 5682, 5684. Model: 140, a hundred and fifty & 150s-1 Type 5685 Style:B Colour:Black+silver Material:Metal Size:6cm Package Contents: 1 * Shaver information superhighway 1 * cutter head Only the above kit content, other merchandise aren't included. Note: Light and various displays could cause the color of the item in the photo somewhat diverse from the genuine thing. The size allowed error is +/- 1-3cm.