The FIS-21.4LF from Synergy Microwave Corporation is a Band Pass Filter with Frequency 19.6 to 23.2 MHz, Bandwidth 14.9 to 27.8 MHz @ 20 dB, 6.80 to 64.2 MHz @ 40 dB, Center Frequency 21.4 MHz, Insertion Loss 1.5 dB, Power 1 W. Tags: Surface Mount. More details for FIS-21.4LF can be seen below.