The EMA8F2937P20E25D from ECHO Microwave is a Band Pass Filter with Frequency 2.93 to 2.95 GHz, Insertion Loss 2.5 dB, Rejection 25 dB @ 3000 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8F2937P20E25D can be seen below.