The ECA37000P6000D60K from ECHO Microwave is a Band Pass Filter with Frequency 34 to 40 GHz, Insertion Loss 2 dB, Rejection 60 dB @ DC to 30600MHz, Ripple 0.5 dB, Return Loss 12 dB. Tags: Cavity Filter. More details for ECA37000P6000D60K can be seen below.