The 187-230-6-6 from Narda-MITEQ is a Waveguide Pressure Window with Frequency 3.95 to 5.85 GHz, Pressure 25 PSIG, Peak Power 1500 KW, Power 1300 W, Operating Temperature -40 to 120 Degree C. Tags: Rectangular. More details for 187-230-6-6 can be seen below.