The OHP 75-7 from Beijing Ocean Microwave Corporation is a RF High Pass Filter with Frequency 75 MHz to 1 GHz, Insertion Loss 0.77 to 1.15 dB, Rejection 40 @ 62.6 MHz to 60 @ DC to 57.4 MHz, VSWR 1.23:1, 1.50:1, Return Loss 14 to 20 dB. Tags: Module with Connectors, Chebyshev. More details for OHP 75-7 can be seen below.