The DEI9843-30.00MHz from Dynamic Engineers is a Band Pass Filter with Frequency 29.969 to 30.031 MHz, Bandwidth 62 kHz, Center Frequency 30 MHz, Insertion Loss 5 dB, Rejection 70 dB@±11.5 kHz of Center Frequency. Tags: Surface Mount, Through Hole, Crystal Filter. More details for DEI9843-30.00MHz can be seen below.