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Adjustable Steel Frame

We make adjustable frame for Australian mobile home, and other purposes.
The advantage of adjustable frame is that the frame could adjust according to wall thickness, so you have flexible space, do not worry if the wall is too thick or too thin.


The Adjustable Steel Frame can be adjusted according to the wall thickness, so you have flexible space and do not have to worry about whether the wall is too thick or too thin. Secondly, our product is composed of two side frames and one frame step. The connecting adjustable door frame is used to install the door leaf. By turning the adjusting bolt and connecting block, the door can be easily adjusted after being fixed, thus reducing the difficulty of door installation. Finally, our products are cheap and high-quality, which is deeply loved by our customers.


The frame of Adjustable Steel Frame is unpacked for easy installation, saving loading space and expanding loading capacity. Secondly, we are made of high-quality materials, high-quality, non-toxic, tasteless, which will not cause harm to your body. What’s more, our products are very easy to install or load. Finally, our products have a stylish appearance and a longer service life than the rest of the products.


Brand: Gold Tortoise

Place of Origin: Guangdong, China

Material: Galvanized steel

Steel Thickness: 0.8-2.0mm

Model: NF-86,NF-108,NF-98,NF-114,NF-254mm

Finish: Galvanized/Powder coating/PVC

Color: Silver/White/woodgrain, custom colors available

Accessories: Rubber buffers, hinges, lock striker, tile wires ,temporary bottom rail available on request

After-sale Service: 24h Online technical support



Production Equipment

Our Factory

Golden Tortoise is a leading manufacturer of steel doors in China. Our factory occupies 500,000 square feet, located in Guangdong province, only an hours drive from Guangzhou Baiyun airport. Founded in 1996, we have 27 years of experience in making doors, and we were the first factory to introduce knock-down steel door frames from Australia. We hold over 100 invention patents and advanced production technology, and enjoy a good reputation in the industry. 


Q: What is the delivery time?

A: Normally 30-35days after received the deposit and confirmed all the details.

Q: What’s the adjustable frame thickness range?

A: It is 60-300 mm

Q: What are your main products ?

A: Door frame, interior door, security door, fire-rated door.

Q: When did your company establish?

A: Our company is establish in 1996, has 26 years experience of manufacture door and door frame. We are expert of door in China.

Why Choose Us?

  • We pride ourselves on our ability to deliver high-quality steel door frames at affordable prices.
  • We regard talents as the source of competitiveness of our company, and continuously develop the core skills and expertise of our staff according to the development strategy and competition requirements.
  • We have a range of steel door frames in different shapes and sizes to accommodate any project.
  • We have a professional R&D system with advanced production and quality testing equipment to produce perfect Adjustable Steel Frame.
  • Our steel door frames come in a range of sizes and styles to suit your project requirements.
  • Our company is following the development strategy of ‘science and technology, diversification, collectivization and service’, striving to build a large company.
  • As a leading supplier of steel door frames in China, we are committed to providing our customers with the best possible service and products.
  • Customers have recognized our products, service quality, business purpose, capability and corporate value many times during the cooperation process.
  • We offer a variety of finishes for our steel door frames, including powder coating and galvanizing.
  • Our company continuously improves the quality of Adjustable Steel Frame and enhances the trust of customers.

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