- Compatibility: Designed specifically for MS171, MS181, and MS211 chainsaw models. Replace OEM part number: 1139 120 1602. - Enhanced Engine Performance: Improve your lawn mower’s efficiency and longevity with our premium air filter. It captures dust, dirt, and debris before they reach the engine, ensuring a clean airflow for optimal combustion. Experience better performance and smoother operation. - Extended Engine Life: Protect your investment with our durable lawn mower air filters. By preventing harmful particles from entering the engine, our filter reduces wear on critical components like piston rings and cylinders, ensuring reliable and long-lasting performance. - Superior Filtration: Enjoy exceptional filtration with our high-quality garden air cleaning tool. Our filter utilizes advanced media to effectively trap even the smallest particles, including pollen and grass clippings, keeping the air intake clean and preventing engine damage. Rest assured that your engine is well-protected. - Practical Applications: Ideal for regular lawn maintenance, outdoor landscaping, or seasonal yard clean-up. Whether you're mowing your lawn or tackling tough brush, our air filter ensures your equipment runs at peak performance. - Product Specifications: Made from high-quality materials for durability and efficiency. Easy to install and compatible with your existing equipment, making maintenance straightforward and hassle-free. Invest in our air filter to maintain your equipment's performance and prolong its life.