The EMA8F1705P20C50C from ECHO Microwave is a Band Pass Filter with Frequency 1.7 to 1.72 GHz, Insertion Loss 1.5 dB, Rejection 50 dB @ 1405MHz, Return Loss 16 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F1705P20C50C can be seen below.