The NOS Donaldson P136255 Air Filter is a high-quality primary round air filter designed for use in various heavy equipment. Made in the United States by Donaldson, a trusted brand in the industry, this filter is specifically designed to provide clean and efficient air filtration for your equipment. With its durable construction and compatibility with a range of machinery, this air filter is a reliable choice for ensuring smooth and uninterrupted operation on the job site.