You can trust that Best Access Doors will always provide you with the quality access doors you need. This is why we are proud to introduce to you one of our quality products, BA-FD2D-40-48. The Largest Ceiling Door Available With Double Doors and Removeable Center Mullion. Double Leaf Allows Greater Accessibility. Materials: Painted, galvanized steel or 304 stainless steel Frame: 14 ga steel. Removable center mullion (max 48”). Frame Depth 2 1/4”. Wall Trim: 1-1/4” (32mm). Door Panel: 18ga, liner 22ga with slam latch. Insulation: The door panel contains 1 1/2” high-temperature insulation material. Finishes: Paint finish is an electrostatically applied rust-inhibitive prime coat or # 4 polished stainless steel finish on the exterior surface Hinges: Concealed continuous rod hinge. 48” or longer in-wall position will be a continuous piano hinge. The hinge is placed on the “H” dimension. Here at Best Access Doors, we guarantee our products have high-quality materials. If you have additional questions about our products, you can give us a call at 1-800-483-0823.