The DEI9869-40.455MHz from Dynamic Engineers is a Band Pass Filter with Frequency 40.447 to 40.463 MHz, Bandwidth 16 kHz, Center Frequency 40.455 MHz, Insertion Loss 3.5 dB, Rejection 50 dB@±100 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9869-40.455MHz can be seen below.