Special Features:

Electrically heated; length of top of window is 24.500 in; shape is trapezoidal with exception that from bottom edge along both sides, their is a 2-inch high edge which forms 90-degree bottom edge corners, making this a six-sided figure

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.