The DMCF45C004-45.00MHz from Dynamic Engineers is a Band Pass Filter with Frequency 44.985 to 45.015 MHz, Bandwidth 30 kHz, Center Frequency 45 MHz, Insertion Loss 3 dB, Rejection 30 dB@±50 kHz to 70 dB@± 910 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DMCF45C004-45.00MHz can be seen below.