The EMA4F1627P25J20D from ECHO Microwave is a Band Pass Filter with Frequency 1.62 to 1.64 GHz, Insertion Loss 5 dB, Rejection 20 to 45 dB, Return Loss 20 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4F1627P25J20D can be seen below.