The BPF-B177 from Mini Circuits is a Band Pass Filter with Frequency 170 to 185 MHz, Bandwidth 15 MHz, Center Frequency 177 MHz, Insertion Loss 2.42 to 2.46 dB, Rejection 20 dB @ 150 and 210 MHz. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for BPF-B177 can be seen below.