The ECRA433F435A15B from ECHO Microwave is a Band Stop Filter with Stopband Frequency 433 to 435 MHz, Bandwidth 2 MHz, Insertion Loss 0.5 dB ( DC-427, 876-1050 MHz), Rejection 15 dB. Tags: Module with Connectors, Ceramic Filter. More details for ECRA433F435A15B can be seen below.