The 137-230-2-2 from Narda-MITEQ is a Waveguide Pressure Window with Frequency 5.85 to 8.2 GHz, Pressure 35 PSIG, Peak Power 750 KW, Power 1000 W, Operating Temperature -40 to 120 Degree C. Tags: Rectangular. More details for 137-230-2-2 can be seen below.