The OEM Stihl MS 311, MS 362, MS 391, MS 400 Anti Vibration Mount # 1140 790 8300 is a plastic vibration mount designed specifically for Stihl chainsaws. This anti-vibration mount is compatible with the Stihl MS 311, MS 362, MS 391, and MS 400 models, providing a secure and stable attachment for easy handling and operation. With no assembly required, this product is convenient for users who are looking to replace or upgrade their current vibration mount on their 2-stroke gasoline-powered chainsaw.