Easy to install. Clean the shaver before installation. Please identify your shaver model. Applicable models: 9199XL, 9195XL, 9190XL, 9170XL, 8240XL, 8250XL, 8251XL, 8260XL, 8260XL, 82270XL, 8270XL, 8170XL, 8171XL, 817 5XL, 8280XL, 8160XL, 815 0, 8140XL, 8138XL. AT928 HQ9199, HQ9190CC, HQ9170, HQ91609, HQ9140, HQ9080, HQ9070, HQ9020, HQ8290, HQ8270, HQ8250, HQ8240, HQ8173, HQ8170, HQ8160, HQ8150, HQ8140, HQ8100 HQ9 Color: Silver Material: Plastic + Metal Size: 6 x 6 x 2 cm Package Contents: 1 Replacement Head Package Contents Above Only, Other Products Not Included. Note: Light photography and different monitors may cause the color of the product in the picture to be slightly different from the actual product. The measurement allowance is +/- 1-3 cm.