Easy to install. Clean the razor earlier than installing. Please make certain properly your razor model. Model: 10 B / 20 B Compatible 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, Z60 Colour: blue + black Material: metal Package Contents: 1 x knife mesh 1 x knife head 1 x bracket Only the above kit content, other products aren't included. Note: Light capturing and diverse reveals could cause the color of the thing within the picture slightly various from the genuine thing. The length allowed error is +/- 1-3cm.