The BPF-C4R5+ from Mini Circuits is a Band Pass Filter with Frequency 2 to 7 MHz, Center Frequency 4.5 MHz, Insertion Loss 0.5 to 1.5 dB, Upper Rejection 20 to 28.9 dB, Lower Rejection 20 to 35.9 dB. Tags: Surface Mount, Lumped Component Filter. More details for BPF-C4R5+ can be seen below.