The QHF-4000-20000-50 from Qualwave is a RF High Pass Filter with Frequency 4 to 20 GHz, Bandwidth 16000 MHz, Insertion Loss 1 dB, Rejection 50 dB, Lower Rejection 50 dB @ DC to 3.4 GHz. Tags: Module with Connectors. More details for QHF-4000-20000-50 can be seen below.