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16x27x6, Furnace FilterSpaceGard 16x27x6
A401-SG4-11R | BestAir® 16 x 27 x 6, Air Cleaning Furnace Filter without Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2400 (401) & Lennox PMAC-12C 27″
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16x27x6, Furnace FilterSpaceGard Box 16x27x6
A401-SG4-BOX11R | BestAir® 16 x 27 x 6, Air Cleaning Furnace Filter with Cardboard Frame, MERV 11, For Aprilaire/SpaceGard 2400 (401) & Lennox PMAC-12C 27″
16x27x6
