Easy to install. Clean the machine before installation. Compatible with: Model: 1 110 120 130, 130s-1 and 815 type 5683. Model: 130s-1, 140, 150, 150s-1 and 835 type 5682, 5684. Model: 140, 150 and 150s -1 type 5685 Make sure the razor model is correct. Model number: for Braun 11B 684 series Product type: electric shaver parts Model: 11B Size: 4.6 * 4 * 3.8 cm Material: ABS + stainless steel Color: black + silver Package content: 3 * replacement film shavers 3 * head shaver blade Only 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 error is +/- 1-3cm.