The Farmertec muffler gasket is designed to fit Stihl FS45, FS46, FS55, and HS86 engines. This 2-stroke gasket is compatible with gasoline-powered equipment and comes in a pack of 1. It is an essential part for string trimmers, brush cutters, and weed trimmers, making it suitable for various outdoor power equipment. This high-quality gasket ensures a secure and leak-free seal, allowing for smooth operation and optimal performance of your Stihl engine.