The EDA6E1850P100E18 from ECHO Microwave is a Band Pass Filter with Frequency 1.8 to 1.9 GHz, Insertion Loss 2.5 dB, Rejection 18 to 40 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EDA6E1850P100E18 can be seen below.