The CER0373B from CTS Electronic Components is a Band Pass Filter with Frequency 3.6 to 3.65 GHz, Bandwidth 50 MHz, Insertion Loss Less than 3.5 dB, Rejection 25 to 27 dB, Power 2 to 20 W. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for CER0373B can be seen below.