The ECA8250P350B40A from ECHO Microwave is a Band Pass Filter with Frequency 8.08 to 8.43 GHz, Insertion Loss 1 dB, Rejection 40 dB @ DC to 7750MHz, Ripple 0.4 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA8250P350B40A can be seen below.