The RWPW-5.95-6.75-WR137-FDM70-5kW-CW-a21 from Raditek is a Waveguide Pressure Window with Frequency 5.95 to 6.75 GHz, Pressure 15PSIG, Insertion Loss 0.2 dB, Power 5 kW. Tags: Rectangular. More details for RWPW-5.95-6.75-WR137-FDM70-5kW-CW-a21 can be seen below.