MMI Door was formed over 60 years ago. They are located in Ohio, Pennsylvania and their headquarters is based in Sterling Heights, Michigan. Air-Tite Replacement likes to use MMI Door because of their various styles, glass patterns, and finishing options.
MMI Door offers entry doors in steel or fiberglass. Their steel and fiberglass doors are available in a paintable smooth finish and their wood-grained fiberglass doors come in a couple of grain patterns that are suitable for staining or painting. They offer a large choice of hinge colors and a wide variety of decorative glass patterns and styles with varying levels of privacy.