The Porter-Cable® 78117 top filter is a cost effective replacement filter for the Porter-Cable® 7812 and 7814 power tool triggered vacuums. The 78117 replacement filters are incredibly cost effective, because they can be washed and reused instead of throwing them out once they're dirty. Their 5.7 sq-ft of surface area trap 99.85 % of the dirt and dust particles in the air. Porter-Cable® Vacuum Filter, Exhaust, 0.99 Efficiency, 9.5 in L x 5.5 in W x 2.4 in H Size, For Use With: 7812 and 7814 Power Tool Triggered Vacuum, Paper