The ECA473P1H50B from ECHO Microwave is a Band Pass Filter with Frequency 473.35 to 474.16 MHz, Insertion Loss 4 dB, Rejection 50 dB @ 450 to 471.1675MHz, Ripple 1.5 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA473P1H50B can be seen below.