This is an anodized aluminum Observation Window.  It has a 1.0 in. (25 mm) diameter non-breakable plastic viewing window that allows the contents of the container to be readily observed, eliminating the cost of opening the package for inspection.  Also accepts TA384-HC-MHI Maximum Humidity Indicator Element or TA346-HC-2345S Color-Change Disc. 

It may be installed in flexible barriers through a 1.45 in. (37 mm) diameter hole.  Nut and two gaskets are furnished.  It may also be installed in rigid containers through a 1.45 in. (37 mm) diameter hole by removing one gasket and reversing the nut.

TA446 is appropriate for use on NEMA 1, 2, 3, 3R, 3S, 4, 5, 6, 12, 12K, and 13 enclosures, as well as IP66/IP67 enclosures.  This item may also be appropriate for use on other NEMA or IP enclosures, depending upon the application.  Contact AGM's Engineering department for more information.