The 2657-BNC from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 67.5 to 72.5 MHz, Bandwidth 5 MHz, Center Frequency 70 MHz, Insertion Loss 3 dB, Rejection 40 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2657-BNC can be seen below.