The TROY-BILT AIR FILTER with pre filter # 737-05129 , 937-05129 is a high-quality air filter designed specifically for Troy-Bilt equipment. It is compatible with other Troy-Bilt products, ensuring a perfect fit and optimal performance. This air filter is essential for keeping your equipment running smoothly by filtering out dirt, debris, and other contaminants from the air intake. With this filter in place, you can trust that your Troy-Bilt equipment will continue to operate efficiently and effectively.