The ELELA3000C50A from ECHO Microwave is a Low Pass RF Filter with Frequency 0 to 3000 MHz, Bandwidth 3000 MHz, Insertion Loss 1.2 dB, Rejection 50 min. @ 4000MHz, Return Loss 15 dB. Tags: Module with Connector, Lumped Component Filter. More details for ELELA3000C50A can be seen below.