
3 3/4" Spring Fitting for Garage Door Spring Cone. Aluminum Alloy Material: Constructed from durable aluminum alloy for long-lasting performance. Flexible Customization: Supports full customization, minor customization, and design-based options. OEM/ODM Service: Professional OEM and ODM services available for tailored manufacturing. 100% Quality Inspection: Strict visual and functional inspection for all finished products. Quality Return Policy: Quality problems will be returned or replaced by the manufacturer. Free Sample Offer: Free samples available for a few pieces; buyer pays freight only. Mold Cost Refund: Mold cost can be returned when order quantity reaches a certain amount. Fast Production Lead Time: Production lead time is 10-25 days for a 20ft container.