The ECRA1710F1755C40B from ECHO Microwave is a Band Stop Filter with Stopband Frequency 1710 to 1755 MHz, Bandwidth 45 MHz, Insertion Loss 1.5 dB, Rejection 40 dB. Tags: Module with Connectors, Notch Filter, Cavity Filter. More details for ECRA1710F1755C40B can be seen below.