Import Exterior Steel Door — Buy in Bulk from Supplier in China

This exterior steel door is constructed from cold-rolled steel with a minimum thickness of 0.8 mm, as stated in the product source. The door frame is reinforced with internal steel stiffeners to prevent warping under thermal stress. Standard dimensions range from 860 mm to 1220 mm in width and 2000 mm to 2100 mm in height, with custom sizes available upon request. The core is filled with polyurethane foam insulation, providing thermal resistance of approximately R-4.5 per inch, reducing energy transfer between interior and exterior environments.

The surface finish is powder-coated or galvanized, with options for wood-grain embossing or smooth textures. These finishes meet ASTM A653 Grade 340 for corrosion resistance and are tested for 720 hours of salt spray exposure per ASTM B117. Typical door weights range from 45 kg to 75 kg depending on size and insulation thickness. The door includes a multi-point locking system with steel deadbolts and reinforced strike plates, compatible with standard commercial door hardware standards. No certifications are claimed by the supplier, but the materials align with common industry practices for export-grade steel doors.

These doors are primarily purchased by contractors for new residential developments, commercial office buildings, and security-focused facilities such as data centers and industrial warehouses. Buyers typically order in quantities of 50 to 500 units per shipment, often for projects requiring uniform exterior aesthetics and high impact resistance. Packaging is in wooden crates with foam padding, with 12 to 16 units per 40HQ container based on the supplier's stated capacity. Trade terms include FOB Shanghai and CIF, with lead times of 25 to 35 days after deposit confirmation.

Shanghai Proomas International Trade Inc. is registered at 2123 Pudong Ave, Shanghai 200124, China. The supplier is classified as an imported-tier business with harbor-level trust signals, indicating verified export documentation and shipping history. There is no public information on years in operation, factory ownership, or employee count. The listing confirms no certifications, revenue figures, or client names, and the supplier does not claim direct manufacturing capability.

This supplier acts as an exporter of exterior steel doors sourced from third-party manufacturers in China. Their operational focus is on bulk export logistics, documentation compliance, and customer coordination. Response rate and average response time are not tracked or reported, suggesting limited real-time buyer engagement. The listing does not mention in-house R&D, testing labs, or quality control processes beyond the product's physical specifications.