The ECA6237P125B45A from ECHO Microwave is a Band Pass Filter with Frequency 6.18 to 6.3 GHz, Insertion Loss 1 dB, Rejection 45.0 dB @ 6050 MHz, Ripple 0.3 dB, Return Loss 17 dB. Tags: Cavity Filter. More details for ECA6237P125B45A can be seen below.