Honeywell 203371 Prefilter is a 16 X 12 1/2 Aluminum Prefilter designed to fit the F50A and F50E Electronic Air Cleaners.
Size: Each filter measures 16 x 12 1/2
Fits Models: F50A1017 and 1033
F50E1018, 1034, 1158, 1174, 1281, 1307
Replaces Earlier Model: 136388
Note: This filter must be ordered in multiples of (2), eg. 2,4,6,8,10
This filter is not designed to fit the F50F air cleaner