The WHK8-35-40-40-1000-20 from Wainwright Instruments is a RF High Pass Filter with Frequency 35 / 40 MHz to 1 GHz, Insertion Loss 1.25 to 2.65 dB, Power 20 W, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Lumped Component Filter. More details for WHK8-35-40-40-1000-20 can be seen below.