The 2157-17.25-5-50 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 16.8 to 17.6 MHz, Bandwidth 863 KHz, Center Frequency 17.25 MHz, Insertion Loss 3 dB, Rejection 40 dB. Tags: DIP, Lumped Component Filter. More details for 2157-17.25-5-50 can be seen below.