Masonite's Venting Low-E glass insert combines energy efficient Clear Glass with an easy-open lower Sash. Its virtually maintenance-free and will not yellow or crack. Our high-quality steel entry door is sure to suit your design and performance requirements. The high-definition panel profile provides excellent shadow lines, creating outstanding panel definition. For added value this door is insulated with a polyurethane core, providing an energy efficient entry system recognized by . This unit comes double bored making it ready to accept a lock set and deadbolt and has been factory primed, ready to install.