The ECRA1100R5B45A from ECHO Microwave is a Band Stop Filter with Stopband Frequency 1097.5 to 1102.5 MHz, Bandwidth 5 MHz, Insertion Loss 1 dB, Rejection 45 dB. Tags: Module with Connectors, Notch Filter, Cavity Filter. More details for ECRA1100R5B45A can be seen below.