The OHP 90-10 from Beijing Ocean Microwave Corporation is a RF High Pass Filter with Frequency 90 MHz to 1.25 GHz, Insertion Loss 1.06 to 2.47 dB, Rejection 40 @ 81 MHz to 60 @ DC to 77.4 MHz, VSWR 1.23:1, 1.50:1, Return Loss 14 to 20 dB. Tags: Module with Connectors, Chebyshev. More details for OHP 90-10 can be seen below.