Name: Spring for rolling shutterItem No.: MAR. 0309-130, MAR. 0309-170Material: SteelSize: 100*130mm, 120*190mmFor 37mm, 45mm, 55mm, 77mm roller shutter profileCompetitive Advantage: 1. Good Quality: Your client satisfied on our quality. You can get good reputation from your market and obtain more orders. 2. Good Service: Our professional service before and after sale. 3. The reasonable price4. Fast & Cheap Delivery: We have big discount from forwarder (Long Contract). 5. OEM is welcomeAbout Master Well: We have been in roller door for years, including the slats and accessories, such as end slats, connected belt, entry belt, idler, stopper, extended roller, pully, tape coiler, crank and so on. Also we provide the service of roller door installation, hope we can be helpful in your business.