Round Infrared Window,50mm dia,Type 3/12
6 Degrees C (2474 Degrees F), Voltage Range Any, Components Anodized Aluminum Frame and Cover, Body Material Aluminum, Includes Installation Instructions 2 In..Round Infrared Window, Crystal Insert Size 50mm dia, Viewing Aperture Size 45mm dia, Viewing Aperture Area 1590 sq mm, Window Thickness 2 mm, NEMA Rating 12, 3, IP Rating 67, Gasket Maximum Temperature 76.