The WHKE4-50-100-50-1000-1 from Wainwright Instruments is a RF High Pass Filter with Frequency 50 / 100 MHz to 1 GHz, Insertion Loss 0.8 to 1.6 dB, Power 1 W, Rejection 50 dB, VSWR 1.50:1. Tags: Module with Connectors, Lumped Component Filter. More details for WHKE4-50-100-50-1000-1 can be seen below.