Special Features:

Lettering to be 2 inches high in nonmetalic paint, "do not paint window" to be in black epoxy polamide, "radiation hazard" to be in red epoxy polamide, tangentail loss factor .015 , dielectric constant 4.3, transmissabili type 90% at 15.4 to 15.7 ghz, window edges and holes to be sealed with resin, remove burrs and sharp edges

Properties:

A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.