The AWT-BPF4200BW200-Q08 from AWG Tech is a Band Pass Filter with Frequency 4.1 to 4.3 GHz, Bandwidth 200 MHz, Center Frequency 4200 MHz, Insertion Loss 0.8 dB, Rejection 70dB @ 3450 MHz. Tags: Module with Connectors, Cavity Filter. More details for AWT-BPF4200BW200-Q08 can be seen below.