The ECA12800P200D70A from ECHO Microwave is a Band Pass Filter with Frequency 12.7 to 12.9 GHz, Insertion Loss 1.8 dB, Rejection 70 dB @ 12300MHz, Ripple 0.8 dB, Return Loss 16 dB. Tags: Cavity Filter. More details for ECA12800P200D70A can be seen below.