1. Spring boxare used for the Rolling Shutter Door, like Garage Door .

2. Made of general Q235 steel plate give to quality and durability.

3. Surface alvanized in silvery , which make the wheels perfectly resistant to fight against rust.

4. The existing exterior diamaters come in 200mm, 220mm,240mm,260mm.

5. Interior diameter:  42mm 43mm 50mm .60mm 76mm

6. We also supply  hooks which used for the Spring Box

FAQ:

1. Are you a factory or trading company?
Guangzhou Panyu Yongbida Hardware Factory is a professional manufacturer from Guangdong province, we have high quality products of locks, spring box, door hardwares, other accessories, and so on.
 
2.Where is your factory?
Our factory is located in Guangzhou, established in 1990s with 20000m2   and more than 60 employees in different departments , about 30minutes to the CBD of Guangzhou and 1 hour to Guangzhou Baiyun international airport.
   
3.Can you produce the products as per customer design?
We started OEM and ODM business since 2007.  Please refer us samples or 3D drawing, we will offer the best prices for you.
   
4. How does your factory do regarding quality control?
We have staff to check every process, and each product will be inspected before packing by our QC staffs.
   
5. How about your packing?
Our products are packed with multi-packing to protect from the long-district transportation. EPE bag+ thick poly bag+ hardboard inner box +5-layer master carton.
Pallets are available if required, but the charge should be paid by you.
 
 6.How is your After-Sales service?
 Any defective products, Please send us the pictures of defective products to check. If the problem occurred by us, products can be returned, we will send you a replacement without extra fee.
 
7.May I get your sample for free to check before order?
Of course, free sample is available for checking, but you need to pay for the express cost, the delivery is about 2--4 days.
 
8.  How about your delivery day?
Usually our delivery time is about 30days after deposit.
 
9. How can I trust you in the first cooperation?
Firstly, samples can be sent to check our quality and you are welcome to visit our factory. 

10. If you have more questions,  just please contact us !