The ECA13000P500C72A from ECHO Microwave is a Band Pass Filter with Frequency 12.75 to 13.25 GHz, Insertion Loss 1.5 dB, Rejection 72 dB @ 12250MHz, Ripple 0.8 dB, Return Loss 16 dB. Tags: Cavity Filter. More details for ECA13000P500C72A can be seen below.