The DEI9917-21.4865MHz from Dynamic Engineers is a Band Pass Filter with Frequency 21.4765 to 21.4965 MHz, Bandwidth 20 kHz, Center Frequency 21.4865 MHz, Insertion Loss 3 dB, Rejection 45 dB@±24.5 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9917-21.4865MHz can be seen below.