Special Features:

Molded of transparent polycarbonate for internal viewing or light transmission, sixteen sizes for use in 3/16 inch to 2 inch diameter holes, locks firmly into panel up to 1/8 inch thick, snaps into mounting holes with fingertip pressure-no tools required, flammability rating 94v-2, available in a variety of tints besides clear-consult factory; 135 degrees celsius - temperature on part not to exceed 115 degrees c, head diameter-2.157, inches and height-.453

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.