The BPF57MS20A from Sangshin is a Band Pass Filter with Frequency 47.6 to 67.6 MHz, Bandwidth 10 MHz, Center Frequency 57.6 MHz, Insertion Loss 1.5 dB, Upper Rejection 45 to 60 dB. Tags: Surface Mount, Lumped Component Filter. More details for BPF57MS20A can be seen below.