The ELELA50P50C50A from ECHO Microwave is a Low Pass RF Filter with Frequency 0 to 50 MHz, Bandwidth 50 MHz, Insertion Loss 1.2 dB, Rejection 50 min. @ 100~350MHz, Return Loss 14 dB. Tags: Module with Connector, Lumped Component Filter. More details for ELELA50P50C50A can be seen below.