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| Product Name | Constant force spring |
| Material | Stainless steel,Spring steel,Carbon steel |
| Type | Coils |
| Standard | Standard |
| Surface treatment | Nickel / chrome / zinc plating / beryllium copper / coating firm etc. |
| Shipping term | Express, Sea, Air |
| Equipments | Advanced CNC machinery imported |
| Used | Furniture / toy / Industrial / Mechanics |

1. Factory-direct price
2. Small order is welcome
3. Offer agreement "business secret contract"
4. Full refund in case of poor quality
5. 3% discount for new customers