China Professional Roller Shutter Door/Rolling up Door Shaft Collar electric motor shaft collar
Product Description 1. Spring box are 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. We also supply hooks which used for the Spring Box 5.Details: Outer Diameter […]
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