Description
Product Demonstration Video
Product Overview: DONGJI Intelligent Lockbox 4B Aluminum & Stainless Steel Mailboxes for New Building Developments
Our DONGJI intelligent mailboxes offer a secure solution for new building developments, featuring lockable compartments crafted from durable stainless steel and aluminum. Ideal for office buildings and residential complexes, these mailboxes enhance security while offering sleek aesthetics.
Key Features
- Premium build with stainless steel and aluminum for durability and aesthetics.
- Lockable compartments ensure security for sensitive mail and packages.
- Customizable sizes to fit any installation requirement from offices to residential buildings.
- Advanced electronic controls available for enhanced access management.
- OEM/ODM service allows tailored solutions for specific client needs.
- Efficient manufacturing processes like laser cutting and powder coating for precision and quality.
Key Specifications at a Glance
- Available materials: Stainless Steel, Aluminum, Brass, etc.
- Processing includes Laser Cutting, Welding, and more.
- Custom sizes ranging from small to large dimensions.
- Lead time: 15-30 days depending on order size.
- OEM & ODM services offered.
Application & Manufacturing Capabilities

Precision Sheet Metal Source Factory
As a direct source factory in Guangdong, Dongji customizes sheet metal enclosures and structural parts. Equipped with 30,000W fiber lasers, CNC bending machinery, and 24/7 robotic welding, we ensure ±0.1mm precision and 1000h+ salt-spray tested powder coating.
Technical Specifications Table
| Specification | Detail |
|---|---|
| Place of Origin | Guangdong, China |
| Brand Name | DONGJI or Customized |
| Model Number | DJ-S-003 |
| Product name | custom 4b mailboxes for new buildings mailboxes with lock |
| Material | Steel, Stainless steel, Aluminium, Galvanized Steel, Brass, etc. |
| Processing | Laser cutting, Punching, Bending, Stamping, Welding, Polishing, etc. |
| Finishing | Powder coating, Oxidization, Electrophoresis, Galvanization, etc. |
| Size | Customized. Range from 8mm*10mm*20mm to 1000mm*700mm*4000mm |
| Service | OEM & ODM is acceptable |
| Package | Dongji design or customized |
| Delivery time | 15 days for sample, 30 days for mass production |
| Payment term | T/T, L/C, Paypal, Western Union, etc. |
| Application | Industry |
Product Details & Real Shots
















Factory Production Video
Dongji OEM/ODM Manufacturing Advantages
Jiangmen Dongji Intelligent Equipment Co., Ltd. — Direct Source Manufacturer for B2B Custom Sheet Metal Fabrication & Smart Equipment.
Frequently Asked Questions
What materials are suitable for outdoor environments?
For outdoor environments, we recommend stainless steel or aluminum for their corrosion-resistant properties.
Can these mailboxes be integrated with electronic access systems?
Yes, DONGJI mailboxes can be equipped with advanced electronic controls for secure, keyless access.
What customization options are available?
Sizes, materials, and electronic features can all be customized to meet the specific needs of office buildings and residential complexes.
What is the typical lead time for a bulk order?
Our standard lead time is 15 days for samples and 30 days for mass production, depending on the order size.
Are these mailboxes compliant with international security standards?
Yes, our products meet various international security and manufacturing standards. Specific certifications can be provided upon request.


