The DEI9746-5.251MHz from Dynamic Engineers is a Band Pass Filter with Frequency 5.131 to 5.371 MHz, Bandwidth 240 kHz, Center Frequency 5.251 MHz, Insertion Loss 4.5 dB, Rejection 60 dB@± 2000 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9746-5.251MHz can be seen below.