The ECLA1300D40B from ECHO Microwave is a Low Pass RF Filter with Frequency 0 to 1300 MHz, Bandwidth 1300 MHz, Insertion Loss 2 dB, Rejection 40 @ 1500MHz~3950 MHz, Return Loss 14 dB. Tags: Module with Connector, Cavity Filter. More details for ECLA1300D40B can be seen below.