The DEI5813-127.50MHz from Dynamic Engineers is a Band Pass Filter with Frequency 127.487 to 127.525 MHz, Bandwidth 25 KHz, Center Frequency 127.5 MHz+/-2KHz, Insertion Loss 4 dB, Rejection 40 +/- 150 KHz to 60 dB +/- 350KHz. Tags: Through Hole, Crystal Filter. More details for DEI5813-127.50MHz can be seen below.