The ECA5812P125A30BP-BR from ECHO Microwave is a Band Pass Filter with Frequency 5.75 to 5.88 GHz, Insertion Loss 0.5 dB, Rejection 30 dB @ 5470 to 5695MHz, Ripple 0.3 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA5812P125A30BP-BR can be seen below.