Replacement for Model 2400 (SG4-PR). Type 401 Pleated MERV 11, 401i. Fits Cabinet size 29-5/16Dx17-3/4Hx9-1/2W. Pull out box size 16-3/8x28x7-1/2". Also fits Space-Gard 2400, Lennox PMAC-12C, X0577, York, Source 1, S1-FM401, FM401BestAir Pro SG4PR. This product is not manufactured or distributed by Research Products Corporation, owner of the registered trademark Aprilaire®.
The Magnet logo on this page signifies that this product is a factory direct replacement to the OEM branded filter.