High Quality USA Made Replacement Air Intake Replacement Air Filter for Campbell Hausfeld WL012300AV, ST073916AV. 3" Outside Diameter (At Widest part) X 2.5" Inside Diameter (at lower section) X 1.37" 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. 12 SCFM.