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Our Heavy-Duty Mailbox – Rugged for Long-Term Use

Our heavy-duty mailbox is built with thick metal (16-gauge steel) to resist dents, impact, and theft. It has a reinforced door, weatherproof seal, and spacious interior for large parcels. Suitable for rural areas, busy neighborhoods, or commercial use, it withstands harsh weather. Backed by our 20+ years of manufacturing, it’s long-lasting, and our team can offer lockable options for extra security.
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Why choose us?

Commitment to Excellence

We are dedicated to excellence in everything we do. From product design to after - sales service, we pursue the highest standards, aiming to build long - term and stable partnerships with our customers.

Full - Process Service

From the initial design concept to the final product delivery, we provide a full - process service. This comprehensive service ensures that customers can enjoy worry - free cooperation, with every detail taken care of by our professional team.

Customer - Oriented Philosophy

Customer satisfaction is at the core of our business philosophy. We always listen to our customers' voices, respond to their concerns promptly, and continuously improve our products and services to better serve them.

Related products

Shanghai Kuntu Industrial Co., Ltd.’s “heavyduty mailbox” series is a robust, long-lasting mail storage solution engineered to withstand extreme weather, heavy use, and potential tampering—ideal for rural properties, commercial locations, high-traffic neighborhoods, or areas prone to harsh environmental conditions (e.g., heavy snow, strong winds, saltwater spray). Unlike standard mailboxes that may dent, rust, or break under stress, our heavyduty mailbox is constructed from thick-gauge metals and reinforced components, leveraging over 20 years of manufacturing experience and BSCI-certified quality control to deliver unmatched durability for global users. The construction of our heavyduty mailbox prioritizes strength and resilience. The body is crafted from 14–12 gauge cold-rolled steel (thicker than standard 16-gauge mailboxes) with a double-powder-coated finish (zinc primer + topcoat) that resists rust, corrosion, and UV fading—critical for coastal areas (e.g., Florida, Australia’s Gold Coast) or regions with harsh winters (e.g., Canada, Scandinavia). The door is reinforced with a steel frame and features a heavy-duty hinge system (stainless steel pins, no plastic components) that prevents sagging or breaking even after thousands of uses. The interior is spacious (14”x10”x8” on average) to accommodate large packages, thick magazines, and bulk mail—addressing the growing demand for e-commerce delivery storage. For added security, all models include a tamper-resistant lock option (key-operated or combination) that prevents mail theft, and a reinforced lid that resists prying with tools like screwdrivers or crowbars. A standout case involves a rural property owner in Canada who installed our heavyduty mailbox along a dirt road prone to snowplow impacts and wildlife activity. After 4 years of use, the mailbox showed no signs of dents (despite being hit by snowplows twice) and no rust (even with regular exposure to road salt). The large interior easily fits monthly farm supply catalogs and packages from agricultural suppliers, and the lock has prevented mail theft by local wildlife (like raccoons) and passersby. The property owner noted that the mailbox’s durability far exceeded their previous standard mailbox, which needed replacement every 1–2 years. For commercial locations like gas stations, convenience stores, or industrial facilities, our heavyduty mailbox is a reliable choice. A gas station in the United States uses our model to receive daily delivery invoices and small packages, with the reinforced body resisting damage from stray shopping carts and the lock ensuring sensitive business mail remains secure. The station manager reported that the mailbox has required no maintenance beyond occasional cleaning, even with daily use by delivery drivers. Our heavyduty mailbox series offers multiple configurations to fit different needs: - Curbside post-mounted: Ideal for residential rural properties, with a wide base for stability in high winds. - Wall-mounted: Suitable for commercial buildings or urban locations with limited space, featuring heavy-duty mounting brackets. - Freestanding: Designed for industrial facilities, with a steel frame that anchors to the ground (resists tipping from strong winds or impacts). Our commitment to cross-cultural adaptability ensures our heavyduty mailbox meets regional challenges. For example, in coastal regions, we use marine-grade stainless steel components to prevent saltwater corrosion; in desert areas (e.g., Arizona, Middle East), we add a heat-resistant topcoat to prevent paint fading and metal warping. In countries like Australia, where wildlife (e.g., kangaroos) may collide with mailboxes, we offer an extra-thick steel body (12-gauge) for maximum impact resistance. Our foreign trade team also provides region-specific installation guidance—helping clients in areas with permafrost (e.g., Alaska) or loose soil (e.g., parts of Africa) properly anchor the mailbox to prevent shifting. Every heavyduty mailbox undergoes rigorous testing at our Shanghai factory, including: - Impact tests: The body is struck with a 10-pound weight from 3 feet to simulate snowplow or wildlife impacts. - Corrosion tests: The mailbox is exposed to salt spray for 300 hours (twice the industry standard) to verify rust resistance. - Load tests: The lid is subjected to 50 pounds of weight to ensure it does not bend or break. We also offer customization options, such as adding reflective strips (for night visibility in rural areas), company logos (for commercial clients), or extra-large slots (for oversized mail like architectural plans). If you are seeking a mailbox that can withstand harsh conditions and heavy use, please contact our team. We can provide detailed material specifications, impact resistance ratings, and bulk pricing for commercial or residential projects.

Frequently Asked Questions

How do you ensure the timely delivery of products?

Our factory in Shanghai, with its advanced production facilities and strict management system, guarantees stable product supply. Also, we cooperate with reliable logistics partners to ensure efficient product delivery.
Yes, all our products, including gun safe boxes, go through strict testing standards. They are tested for durability, security performance, and other aspects to meet relevant safety standards.
Absolutely. We provide comprehensive after - sales support, including product maintenance, repair, and technical guidance. Our after - sales team is always ready to assist customers.
We offer a variety of combination locks. The specific number and types can be found on our website or by contacting our sales representatives for detailed product catalogs.

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Customer Reviews

David Brown
Spacious Parcel Deposit Box for Online Shoppers

As someone who orders a lot online, this parcel deposit box is a lifesaver. It’s large enough to hold most Amazon packages, including medium-sized boxes. The lock is secure, so delivery drivers can drop off parcels without me being home. The door opens wide, making it easy to retrieve packages, and it’s weatherproof—no rain or snow gets inside. I mounted it near my front door, and it looks neat and doesn’t take up much space.

Linda Davis
Weatherproof Parcel Deposit Box for Outdoor Use

I live in an area with frequent rain, but this parcel deposit box keeps my packages dry every time. The roof has a slope that prevents water from pooling, and the door seal is tight. The lock has a cover to protect it from the elements, so it doesn’t rust or get stuck. It’s also easy for delivery drivers to use—they just open the outer door, place the parcel inside, and close it. No more missed deliveries or wet packages!

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Choose Our Parcel Deposit Box – No More Missed Deliveries

Choose Our Parcel Deposit Box – No More Missed Deliveries

Our parcel deposit box is spacious for packages, weatherproof, and has a notification feature. It’s easy for drivers to use and secure against theft – ideal for online shoppers. Backed by our factory’s experience, it’s durable. Contact us for installation help!