The OHP 50-7 from Beijing Ocean Microwave Corporation is a RF High Pass Filter with Frequency 50 to 800 MHz, Insertion Loss 0.79 to 1.3 dB, Rejection 40 @ 41.8 MHz to 60 @ DC to 38.3 MHz, VSWR 1.23:1, 1.50:1, Return Loss 14 to 20 dB. Tags: Module with Connectors, Chebyshev. More details for OHP 50-7 can be seen below.