The ECRA851F860D30B from ECHO Microwave is a Band Stop Filter with Stopband Frequency 851 to 860 MHz, Bandwidth 9 MHz, Insertion Loss 2.0 dB ( 824-849, 862-2200 MHz), Rejection 30 dB. Tags: Module with Connectors, Ceramic Filter. More details for ECRA851F860D30B can be seen below.