LANGE operates a 20,000 m² factory in Zhengzhou, China, with 22+ years of experience in high-performance aluminum doors and windows, including custom grid glass doors.
Advanced CNC and automated equipment, including the German Elumatec SBZ 628 CNC Processing Center, ensures precise fabrication, clean grid detailing, and consistent quality.
From custom sizes and grid patterns to glass, hardware, surface finishes, mass production, export packaging, and installation guice, our professional team provides complete project support for global customers.


Slim, precisely aligned muntins create a clean, balanced, and elegant appearance.
Large glass panels allow more natural light while maintaining visual separation between spaces.
French-inspired grid details combined with slim aluminum frames suit both classic and contemporary interiors.
Glass panels create an open feel while defining different living and working areas.
Precision-fitted components ensure smooth and comfortable daily use.
Clear, frosted, tinted, Low-E, and other glass options are available for different privacy and performance needs.
| Application | Recommended Use | Key Benefit |
|---|---|---|
| Villa & Luxury Home | Living room, kitchen, bedroom, home office | Elegant French style + natural light |
| Modern Apartment | Room divider, kitchen entrance, study | Creates openness while defining spaces |
| B&B & Boutique Hotel | Guest rooms, lounges, corridors | Adds a distinctive architectural character |
| Restaurant & Café | Entrance, dining area, private rooms | Enhances ambience and visual connection |
| Retail & Showroom | Storefront, display area, interior partition | Improves visibility and creates a refined look |
| Interior Partition | Living room, wardrobe, dressing room, study | Separates spaces without blocking light |


Multiple Door Styles — Swing, sliding, and double-leaf options, with custom arch, curved, and arched-top designs for an authentic French vintage look.
Authentic Muntin Design — Choose internal or 3D external muntins with customizable width and spacing. Precisely integrated for a refined, durable finish—no stick-on grids.


Professional experience in aluminum windows, doors, and architectural systems.
A modern integrated production facility with strong manufacturing capacity.
Equipped with imported CNC and automated production equipment from Germany, Italy, and Japan.
Customized dimensions, glass configurations, colors, finishes, and opening methods for different projects.
Supporting large-volume and full-container orders with efficient production and reliable delivery schedules.
Serving customers across North America, Europe, Australia, New Zealand, the Middle East, and other international markets.



We are a factory-direct manufacturer with 22+ years of experience. Our 20,000 m² facility in Zhengzhou, China is equipped with advanced CNC and automated production equipment, including German ELUMATEC SBZ 628 CNC machining centers.
No worries. With 20+ years of export experience, we provide professional support throughout the entire process: Quotation → Design → Production → Quality Inspection → Shipment → Delivery.
Our standard terms are:
• T/T: 30% deposit, 70% balance before shipment.
• L/C: 100% irrevocable L/C at sight.
Other payment methods may be available depending on the order and transaction terms.
Lead time depends on order quantity, size, glass configuration, color, hardware, and customization. We will provide a confirmed production schedule after the specifications and order details are finalized.
Yes. We can customize the size, panel configuration, aluminum profile, color, glass configuration, and installation requirements according to your project. Please provide the required dimensions, installation location, and drawings or site photos if available.
Yes. Our advanced production equipment supports large-volume and full-container orders, with consistent quality and reliable production capacity.