The QBF-4950-5050-40 from Qualwave is a Band Pass Filter with Frequency 4.95 to 5.05 GHz, Bandwidth 100 MHz, Center Frequency 5000 MHz, Insertion Loss 1.5 dB, Upper Rejection 40 to 80 dB. Tags: Module with Connectors. More details for QBF-4950-5050-40 can be seen below.