The DEI9580-11.50MHz from Dynamic Engineers is a Band Pass Filter with Frequency 11.469 to 11.531 MHz, Bandwidth 62 kHz, Center Frequency 11.5 MHz, Insertion Loss 5 dB, Rejection 60 dB@±75 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9580-11.50MHz can be seen below.