Shaver head should be replaced every 18 months. Replacing your shaver head gives a 25% better shave. For performance; clean regularly Applicable Blade Accessories Knife Omentum 32B 3 Series Ultra-Active-Lift Middle Trimmer cuts neck and chin hairs in fewer strokes High-quality Materials: Made of high-quality materials, so the shaver head is continuous, efficient and easy to use. Material: plastic Item No.: 32B Power supply: rechargeable Function: Shaver accessories Control method: manual replacement Fit for 3series:300S,301S,310S,320S,330S,340S,360S,380S,3000S,3010S,3020S,3030S,3040S,3080S,350CC,370CC,390CC,3050CC,3090CC,cruzer6 etc. colour:black Package Contents: 4 x 32B Solo Only the above package content, other products are not included. Note: Light 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.