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36″x 48″Lightweight Aluminum Access Door The Best Access BA-LT-4000 is a lightweight aluminum access door for walls and ceilings. With a durable design and lightweight components access to large openings in walls and ceilings is made easy. The mitered aluminum frame provides an architecturally pleasing appearance. The aluminum door panel is lined with 3/4″polystyrene insulation. The all aluminum construction of the BA-LT-4000 is ideal for exterior applications and also those specific interior applications where corrosion or moisture is a concern.Gasketing between the door and the frame is1/8″x 3/8″closed cell neoprene gasketing. It is not tested for airtight or watertight. Application Lightweight aluminum access door for walls and ceilings Product Features Mitered aluminum frame provides an architecturally pleasing appearance Aluminum door panel is lined with 3/4″polystyrene insulation All aluminum construction is ideal for exterior applications also specific interior applications where corrosion or moisture is a concern Gasketing between the door and frame BA-LT-4000 Access Door Specifications: Door / Door Frame: Aluminum: .064 door and .080 frame Flush to edge of frame 1-5/16″mitered aluminum extrusion flange with 1-1/2″deep mounting frame Hinge: Doors with width 24″or less to have concealed pin hinge. Doors with width over 24″to have continuous aluminum piano hinge with exposed knuckle set to open to 180 degrees. Insulation: 3/4″Type 3 Expanded Polystyrene EPS Foil Lined Insulation with a 3.18 R Value. Gasket: 1/8″x 3/8″closed cell neoprene gasketing Standard Latch: Screwdriver operated cam latch Finish: Mill finish