The ECA1800P200B60A from ECHO Microwave is a Band Pass Filter with Frequency 1.7 to 1.9 GHz, Insertion Loss 1 dB, Rejection 60 dB @ 1400 to 1550MHz, Ripple 0.5 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA1800P200B60A can be seen below.