The Case-IH AF1685 air filter is a high-quality primary engine air filter designed to protect your agricultural machinery from dust and debris. This filter is a direct replacement for Case-IH part number 87304037 and is essential for maintaining engine performance and longevity in various Case-IH combines, tractors, cotton pickers, sprayers, and windrowers. With an outer diameter of 254 mm, an inner diameter of 137 mm, and a length of 356 mm, it provides efficient filtration for demanding operating conditions.