The ECA161P1D75A-2U from ECHO Microwave is a Band Pass Filter with Frequency 161.5 to 162.5 MHz, Insertion Loss 2 dB, Rejection 75typ. dB @ 157 to 158MHz, Ripple 1 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA161P1D75A-2U can be seen below.