The EMA8J2585P170F40D from ECHO Microwave is a Band Pass Filter with Frequency 2.5 to 2.67 GHz, Insertion Loss 2.5 dB, Rejection 40 to 60 dB, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2585P170F40D can be seen below.