The 2157-205-49-50 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 155 to 255 MHz, Bandwidth 100 MHz, Center Frequency 205 MHz, Insertion Loss 3 dB, Rejection 30 dB. Tags: DIP, Lumped Component Filter. More details for 2157-205-49-50 can be seen below.