The comb teeth technology can arrange and guide the messy beard into the trimmer, reducing the repeated shaving process, making the shaving more effective and more comfortable. Suitable Series: Fit for 3 series, such as 300S, 301S, 310S, 320S, 330S, 340S, 360S, 380S, 3000S, 3010S, 3020S, 3030S, 3040S, 3080S, 350CC, 370CC, 390CC, 3050CC, 3090CC, Cruzen6 and many more. A Better Shave: Replacing your head a 25% better shave. For best performance, please clean regularly. Performance: The replacement head provides your shaver back to performance and a closer shave.easy to install Using ABS and stainless steel material, good wear resistance, not easy to corrode, safe to use. The delicate combination of large and small meshes, 4 kinds of meshes of different shapes, arranged in 5 directions, 20 angles and multidirectional shave beard. Product Name: Shaver Head Replacement Foil & Cutter Brand new and high quality Colour: as shown Material: ABS+stainless steel Package Contents: 2 * Clean Brush 2 * 21B Shaver Head 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.