The DEI9927-43.50MHz from Dynamic Engineers is a Band Pass Filter with Frequency 43.32 to 43.68 MHz, Bandwidth 360 kHz, Center Frequency 43.5 MHz, Insertion Loss 6 dB, Rejection 40 dB@±430 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9927-43.50MHz can be seen below.