The ECA1300P12D60A from ECHO Microwave is a Band Pass Filter with Frequency 1.29 to 1.31 GHz, Insertion Loss 2 dB, Rejection 60 dB @ DC to 1280MHz, Ripple 1 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA1300P12D60A can be seen below.