The 2157-10.5-5-50-SMA from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 10.23 to 10.77 MHz, Bandwidth 540 KHz, Center Frequency 10.5 MHz, Insertion Loss 3 dB, Rejection 40 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2157-10.5-5-50-SMA can be seen below.