The QHF-6000-18000-55 from Qualwave is a RF High Pass Filter with Frequency 6 to 18 GHz, Bandwidth 12000 MHz, Insertion Loss 2 dB, Rejection 55 dB, Lower Rejection 55 dB @ DC to 5.4 GHz. Tags: Module with Connectors. More details for QHF-6000-18000-55 can be seen below.