The DEI9599-20.00MHz from Dynamic Engineers is a Band Pass Filter with Frequency 19.9982 to 20.0018 MHz, Center Frequency 20 MHz, Insertion Loss 4 dB, Rejection 70 dB@±20 kHz of Center Frequency, Ripple 1 dB. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9599-20.00MHz can be seen below.