Sanitaire True HEPA (high efficiency particulate air) filtration requires a totally sealed system to ensure that all air passing through the system exhausts through the filter. Only clean air comes out. This system filters 99.97% of particles as small as 0.3 micron, which is 250 times smaller than the diameter of a human hair. Sanitaire Genuine part # 68905. This filter fits Sanitaire SC3683 and SC3687

Fits both MM and N bag type Mighty Mites.