The AB5000B803 from Anatech Electronics is a Band Pass Filter with Frequency 4.9 to 5.1 GHz, Bandwidth 200 MHz, Center Frequency 5000 MHz, Insertion Loss 0.8 dB, Lower Rejection 70 dB @ 4300-4500 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB5000B803 can be seen below.