This Honeywell compatible pre-filter 203373 that's sturdier than the original brand-name option. These filters have spring clips on the short end.
Fits F50A and F50E series 20x20 Honeywell electronic air cleaners. Two pre-filters required.
Replaces earlier part number 199664.
Approximately 10" x 19-3/4" x 3/8"
Honeywell:
F50A Series: F50A1124, F50A1165
F50E Series: F50E1083, F50E1190, F50E1091, F50E1182, F50E1315, F50E1323
Other Manufacturer Part Numbers: SA224-10x19-3/4x1/4-2TSSS, A69564