The DEI9116-21.40MHz from Dynamic Engineers is a Band Pass Filter with Frequency 21.3965 to 21.4035 MHz, Bandwidth 7 kHz, Center Frequency 21.4 MHz, Insertion Loss 4.5 dB, Rejection 60 dB@±6.5 kHz of Center Frequency. Tags: Crystal Filter. More details for DEI9116-21.40MHz can be seen below.