The ECA2138P57Z25A from ECHO Microwave is a Band Pass Filter with Frequency 2.11 to 2.17 GHz, Insertion Loss 10.5 dB, Rejection 25 dB @ 2167.6 to 2700MHz, Ripple 10.5 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA2138P57Z25A can be seen below.