The 2473-A from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 23 to 30.8 MHz, Bandwidth 7.8 MHz, Center Frequency 26.9 MHz, Insertion Loss 3 dB, Rejection 60 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2473-A can be seen below.