Easy to install. Clean the razor before installation. Please ensure compatibility with your razor model. Applicable models include 9199XL, 9195XL, 9190XL, 9170XL, 8240XL, 8250XL, 8251XL, 8260XL, 8260XL, 82270XL, 8270XL, 8170XL, 8171XL, 8175XL, 8280XL, 8160XL, 8150, 8140XL, 8138XL. Additionally compatible with models AT928, HQ9199, HQ9190CC, HQ9170, HQ91609, HQ9140, HQ9080, HQ9070, HQ9020, HQ8290, HQ8270, HQ8250, HQ8240, HQ8173, HQ8170, HQ8160, HQ8150, HQ8140, HQ8100 HQ9. Colour: Silver Material: plastic + metal Size: 6 x 6 x 2cm Package Contents: 1 x replacement head. Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the item's color in the picture to differ slightly from the actual product. The allowable measurement error is +/- 1-3cm.