Easy to install.Clean the razor before installing.Please make sure well your razor model.Model: 10 B / 20 BCompatible with: FreeControl CruZer face, 1735, 1775, 170, 180, 190, 5728, 5729, cruZer3 (Z3), cruZer4 (Z4), cruZer5 (Z5), 2615, 2675, 2775, 2776, 2778, 2864, 2865,2866,2874,2876,2878,5732,5733,5734, Z20, Z30, Z40, Z50, Z60Colour: blue + blackMaterial: metalPackage Contents:1 x knife mesh1 x knife head1 x bracketOnly 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.