certificated spring for rolling shutter
certificated spring for rolling shutter are the hot selling steel product in our factory, size range 1.0mm to 1.40mm thicknesss and width available in all sizes. Now the spring for rolling shutters are exported to worldwide, USA, Italy, France, Moroco, Middle East, and Central America etc, reputable for good quality and competitve price. We have professtional production team to control the quality strictly. Tempered C67 spring, C67 tempered steel roll, Cgoodsteel Brand spring roll, this steel grade are in popularity.