The OHP 35-3 from Beijing Ocean Microwave Corporation is a RF High Pass Filter with Frequency 35 to 650 MHz, Insertion Loss 0.37 to 0.51 dB, Rejection 40 @ 18.2 MHz to 60 @ DC to 13.7 MHz, VSWR 1.23:1, 1.50:1, Return Loss 14 to 20 dB. Tags: Module with Connectors, Chebyshev. More details for OHP 35-3 can be seen below.