Easy to install.Clean the razor before installing.Please make sure well your razor model.Applicable Model9199XL, 9195XL, 9190XL, 9170XL, 8240XL, 8250XL, 8251XL, 8260XL, 8260XL, 82270XL, 8270XL, 8170XL, 8171XL, 8175XL, 8280XL, 8160XL, 8150, 8140XL, 8138XL. AT928 HQ9199, HQ9190CC, HQ9170, HQ91609, HQ9140 , HQ9080, HQ9070, HQ9020, HQ8290, HQ8270, HQ8250, HQ8240, HQ8173, HQ8170, HQ8160, HQ8150, HQ8140, HQ8100 HQ9Colour: SilverMaterial: plastic + metalSize: 6 x 6 x 2cmPackage Contents:1 x replacement headOnly the above package content, other products are not included.Note: Light shooting 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.