The 2157-88-5-50 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 85.8 to 90.2 MHz, Bandwidth 4.4 MHz, Center Frequency 88 MHz, Insertion Loss 2 dB, Rejection 40 dB. Tags: DIP, Lumped Component Filter. More details for 2157-88-5-50 can be seen below.