The OHP 40-5 from Beijing Ocean Microwave Corporation is a RF High Pass Filter with Frequency 40 to 650 MHz, Insertion Loss 0.6 to 0.83 dB, Rejection 40 @ 29.4 MHz to 60 @ DC to 25.2 MHz, VSWR 1.23:1, 1.50:1, Return Loss 14 to 20 dB. Tags: Module with Connectors, Chebyshev. More details for OHP 40-5 can be seen below.