The ELELA400P175B30B-HP from ECHO Microwave is a Low Pass RF Filter with Frequency 225 to 400 MHz, Bandwidth 175 MHz, Insertion Loss 1 dB, Rejection 30 min. @ 450~2000MHz, 40 min. @ 2000~4000MHz, Return Loss 17 dB. Tags: Module with Connector, Lumped Component Filter. More details for ELELA400P175B30B-HP can be seen below.