The ADBF 6550/3900-A from ADMOTECH is a Band Pass Filter with Frequency 4.6 to 8.5 GHz, Bandwidth 3900 MHz, Center Frequency 6.55 GHz, Insertion Loss 0.5 dB, Power 1 W. Tags: Module with Connectors, Cavity Filter. More details for ADBF 6550/3900-A can be seen below.