Introduction
This roller shutter pulley is made of high-strength galvanized steel and treated with yellow zinc electroplating process to give it a golden color on the surface, which not only enhances the anti-corrosion performance, but also gives the product a refined appearance. The golden tone is a popular color in the Thai market, so this spring box is hot-selling in the Thai market and is deeply loved by customers.
Structural design advantages
✅ Sturdy and durable: Selected high-quality steel, thick and durable, able to withstand long-term high-intensity operation.
✅ Porous design: There are multiple mounting holes around, which is convenient for adapting to roller shutter structures of different specifications, making the installation more flexible and stable.
✅ Center sleeve: The black center sleeve is made of high-strength steel, which is precisely matched with the torsion spring shaft to improve the smoothness of operation, reduce friction loss and extend the service life.
✅ Widened edge: The outer ring is widened and pressed with reinforced lines to further enhance the load-bearing capacity and anti-deformation ability, making it stable under high load.
Scope of application
This product is suitable for all kinds of rolling door systems, especially for warehouses, shops, industrial plants and other places that need to be opened frequently for a long time.
This high-quality torsion spring box combines durability, beauty and high efficiency. It is widely favored in the Thai market and Southeast Asia. It is a high-quality choice for the rolling door industry!

| Product Name | Single Layer Zinc Metal Shutter Door Pulley |
| Ancillary use | Roller up door pulley using with torsion spring |
| Application | Garage Door Roller Wheel / Rolling Shutter Door Accessories |
| Source of Supply | Manufacturer |
| Surface Treatment | Color-plated Zinc |
| Inner Roller Material | Double Row Ball Bearing |