Comb teeth technology can organize and guide messy beards into the trimmer, reducing the repeated shaving process, making shaving more efficient and comfortable. Suitable Series: Compatible with 3 series, such as 300S, 301S, 310S, 320S, 330S, 340S, 360S, 380S, 3000S, 3010S, 3020S, 3030S, 3040S, 3080S, 350CC, 370CC, 390CC, 3050CC, Cruzen. and many more. Better Shaving: Replace your shaver head with a 25% better shave. For better performance, please clean regularly. Performance: The replacement head helps your shaver regain performance and a closer shave. Easy to install. Using ABS and stainless steel materials, 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 multi-directional shaving beard. and high quality Color: as shown Material: ABS + stainless steel Package Contents: 4 * Clean Brush 4 * 21B Shaver Head Only the above package content, other