The WHK4-65-100-40-1500-20 from Wainwright Instruments is a RF High Pass Filter with Frequency 65 / 100 MHz to 1.5 GHz, Insertion Loss 0.5 to 0.65 dB, Power 20 W, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Lumped Component Filter. More details for WHK4-65-100-40-1500-20 can be seen below.