Easy to install. Clean the razor before installing it. Please make sure your razor model is correct. Suitable for razor models: HQ912 HQ913 HQ914 HQ915 HQ916 HQ917 HQ902 HQ904 HQ906 HQ909 HQ986 HQ988 Color: Black Material: ABS Size: 4 x 3 x 2cm Package Contents: 3 x Shaver Replacement Head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.