4 3/8" Outside Diameter, x 3" Inside Diameter, x 2" Height Rated for 99+% removal efficiency at 2 micron Low pressure drop for improved equipment performance Pleated Construction Steel reinforced frame. High Quality Aftermarket Replacement Air Intake Replacement Air Filter for FS Curtis 2601540410. 4 3/8" Outside Diameter X 3" Inside Diameter X 2" Height. Features: Rated for 99+% removal efficiency at 2 micron. Low pressure drop for improved equipment performance. Heavy Duty Pleated Industrial Paper to Remove More Debris. Steel reinforced frame.