Elevate your chainsaw's performance with our premium air filter replacement, designed specifically for a range of popular models including the MS231, MS251, MS271, MS291, MS311, and MS391. Engineered to meet the highest standards, this air filter ensures optimal airflow and engine efficiency, allowing your chainsaw to operate at peak performance. Crafted with precision, the filter features an inner diameter of 1 3/4", an outer diameter of 3 1/8", and a height of 1 3/4", making it a perfect fit for your equipment. Each package includes three high-quality air filters, providing you with ample replacements to keep your chainsaw running smoothly for longer periods. Regular maintenance is crucial for the longevity of your chainsaw, and replacing the air filter is a simple yet effective way to enhance its lifespan. Our filters are designed to trap dust, debris, and other contaminants, ensuring that your engine remains clean and efficient. Before purchasing, we recommend comparing our product images with your original air filter to confirm compatibility. Should you have any questions or require assistance, our dedicated support team is ready to help you promptly. Invest in your chainsaw's health and performance with our reliable air filter replacements. Experience the difference in power and efficiency, and keep your equipment running like new. Don't settle for less—choose quality and performance that you can trust!