- OEM Replacement : This air filter replaces the OEM part number STH: 1141 120 1600. Ensure compatibility by confirming your part number before purchase. - Compatible Models : Designed specifically for Stihl MS231, MS251, MS271, MS291, MS311, and MS391 chainsaws, guaranteeing a perfect fit for optimal performance. - Specifications : - Inner Diameter (ID): 1.675 inches - Outer Diameter (OD): 3.08 inches - Height: 1.70 inches - Enhanced Air Filtration : The STN 605205 Air Filter efficiently traps dust, debris, and other contaminants, improving engine performance and extending the life of your chainsaw. - Practical Uses : - Maintain peak engine efficiency during regular chainsaw operation, ensuring smooth and consistent performance. - Ideal for landscaping professionals who depend on their equipment to work seamlessly in diverse outdoor environments. - Great for DIY enthusiasts who want to keep their tools in top condition for home improvement projects. - Durable Material : Engineered from high-quality materials, this air filter is built to withstand the rigors of outdoor use while delivering reliable filtration. - Easy Installation : Designed for straightforward installation, allowing users to quickly replace the filter and get back to work without hassle.