Description:* 100% brand new and high quality * Easy installation and durable * Excellent replacement of spare parts * Suitable for STIHL MS231, MS241, MS251, MS261, MS271,MS291, MS311, MS362, MS391* Part No. 7679 1141 120 1604Package Included:1 x Air FilterNote:1. We provide clear photos, measurements where possible. Check as much as you can to make sure the item is the one you need.2. Please allow 0.5-1 inch difference due to manual measurement. (1 inch = 2.54cm)3. There are no instructions in this kit. If you want to know how to use or install it, . We will provide assistance as much as possible.