Replacement Fein HEPA Filter using PTFE media with efficiency of 99.97 at 0.3 Microns. Flange and screw not included.Green Klean® Replacement filters use the highest quality filter media. Designed specifically for industrial use, they are always equal to, or exceed OEM quality. Better filtration means cleaner air, less dusting, and longer secondary filter life. Each container is printed to easily identify the vacuum it fits. Clean with Confidence, Replace with Green Klean.