6-Inch CleanFlow HEPA Filter
High-efficiency particulate arrestance (HEPA) filter for 6" round duct/flange air intakes
Blocks 99.97% of particles at .3 micrometers while providing excellent airflow
Features easy-install rubberized collar with steel clamp for a proper seal
Recommended for use with high-velocity inline fans / blowers - may create too much restriction for small duct fan types
Measures (max): 9.25" long x 8.125" diameter, 6" female flange