The STIHL OEM 1145 140 4400 Air Filter Cleaner is a specialized component designed specifically for STIHL chainsaws, such as the MS201T, MS201, and MS201TC models. This 2-stroke air filter is compatible with gasoline-powered chainsaws and comes in a pack of 1, requiring no assembly for easy installation. Perfect for maintaining the performance and longevity of your STIHL chainsaw, this high-quality air filter cleaner ensures a clean and efficient engine for all your yard, garden, and outdoor living needs.