The ELLA3000C20A from ECHO Microwave is a Low Pass RF Filter with Frequency 0 to 3000 MHz, Bandwidth 3000 MHz, Insertion Loss 1.2 dB, Rejection 20 min. @ 3500MHz, 30 min. @ 3800~6000MHz, Return Loss 15 dB. Tags: Surface Mount, Lumped Component Filter. More details for ELLA3000C20A can be seen below.