The QBF-27700-28300-60 from Qualwave is a Band Pass Filter with Frequency 27.7 to 28.3 GHz, Bandwidth 600 MHz, Center Frequency 2800 MHz, Insertion Loss 1.2 dB, Upper Rejection 60 dB @30.3 to 36 GHz. Tags: Module with Connectors. More details for QBF-27700-28300-60 can be seen below.