The 350-233-C3-C3 from Narda-MITEQ is a Waveguide Pressure Window with Frequency 3.5 to 8.2 GHz, Pressure 25 PSIG, Peak Power 1 KW, Power 600 W, Operating Temperature -40 to 120 Degree C. Tags: Double-Ridge. More details for 350-233-C3-C3 can be seen below.