Easy to install. Clean the razor before installing. Please make sure well your razor model. Applicable Model:9199XL, 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 HQ9. Material: Metal colour: As shown Package Contents: 1 x shaver head Only the above package content, other products are not included. Note: Light 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.