Wholesale Cheap Black Overhead Sectional Door Garage Door Spring Torsion Spring
HIGH QUALITY
• Made of heat-treated professional spring steel coils with aluminum cones to make sure they are extremely heavy duty.
• The latest electrophoretic coating technology provide excellent corrosion proof performance and superior abrasion proof performance.
• Salt spray tests up to 300 Hours, and Minimum 16,000 Cycles.
• NEVER need to lubricate the spring, keep hands clean during installation
| Product name | Wholesale Cheap Black Overhead Sectional Door Garage Door Spring Torsion Spring |
| Material | ASTM A229 (82B) |
| Wire size | 0.207/0.218/0.225/0.250/0.262/0.273/0.283/0.295 |
| Inner Diameter | 1 3/4'', 2'', 2 5/8'', 3 3/4''，5 1/4”, 6” |
| Finished | Oil Tempered /Galvanized /Black coated |
| Package | Wooden Case /Crate Boxes |
| Certificate | ISO9001：2008 |
| Capicity | 1000 Ton /Per month |
| Life Cycles | 10000-18000 Times |
| Usage | Residential Sectional Garage Doors/Commercial Sectional Overhead Doors |
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