Content Container Nailor HEPA and ULPA filters are designed specifically to fit Nailor 92LFDF-AL, 92LFDMF-AL, 92LFDHF-AL, 92LFDF-SS, 92RPDF-1SS and 92RPDF-2SS diffusers. Models 92GSF-UL - ULPA Filters 92GSF-HE - HEPA Filters Submittals Individual Submittals 92GSF-HE • Imperial Modules