B.E.A., Inc. - Sensors for automatic doors. SwissShade and Security, Inc. - Supplier explosion proof windows. Metro Door - Commercial security closures including security grilles, shutters and service doors. Screenmobile - Manufacture and install aluminium and steel security doors. Der Tzone Industrial Co., Ltd. - Manufacturer of polycarbonate sheet, bullet resistant laminate, and safety windows. Cambria Corporation - Specializes in alarm sensors for water leaks and door openings for military and industrial applications. Protective Structures, Ltd. - Manufacturers of bullet resistant glass. Also, suppliers of fiberglass, windows, doors and glazing, and custom design, fabrication and installation of architectural bullet resistant products. QMI Security Solutions - Manufactures storm and security shutters for windows, sliding glass doors, balconies, and screened enclosures. Authorized dealers, technical specifications, and locations. Headquartered in Itasca, Illinois. Eurex Shutters - Business beautification and protection.