The WHW2-20500-21000-40-38000-30 from Wainwright Instruments is a RF High Pass Filter with Frequency 20.5 / 21 GHz to 38 GHz, Insertion Loss 0.5 to 0.75 dB, Power 30 W, Rejection 40 dB, VSWR 1.67:1. Tags: Module with Connectors. More details for WHW2-20500-21000-40-38000-30 can be seen below.