# High Precision Stainless Steel Mechanical Watch Mainspring Power Reserve Replacement Accessory
Ideal for professional watch repair, DIY watch movement refurbishment and custom modification
## Product Introduction
If your mechanical watch runs inaccurately or stops working frequently, a worn mainspring is usually the problem. This replacement mainspring, as the core power supply of mechanical movements, provides steady elastic force to support precise timekeeping. Made of top-grade high-toughness stainless steel, it is the perfect replacement for damaged old springs, suitable for both professional watchmakers and DIY watch repair enthusiasts.
## Core Benefits
✅ **Durable Stainless Steel Build**: 100% corrosion, oxidation and abrasion resistant, no deformation even after thousands of times of repeated stretching, greatly prolonging the service life of your watch movement.
✅ **Reliable Consistent Power Supply: Precision-engineered spiral winding process ensures even elasticity release, delivers consistent power to all internal gears, effectively lowers time deviation and keeps your watch running accurately for a long time.
✅ **Longer Power Reserve Feature: Optimized spiral coil structure stores more mechanical energy, noticeably increases your watch's power reserve duration, so you don't need to wind your watch frequently in daily use.
✅ **High Precision Manufacturing**: Strict cutting and polishing process creates a super smooth burr-free coil surface, no friction or jamming inside the watch case, fits most standard mechanical movement barrels perfectly.
✅ **Hassle-Free Installation: Standard universal size matches most mainstream mechanical watch movements on the market, can be installed easily with basic watch repair tweezers, suitable for both professional watch shop maintenance and personal DIY watch refurbishment projects.
## Specifications
Type: Watch Movement Repair Spare Part
Material: High toughness stainless steel
Size: Multiple universal sizes available, minimum diameter 8.75mm (see images for full size details)
Color: Metallic silver
Applicable scenes: Manual/automatic mechanical watch movement repair, broken spring replacement, professional watchmaker maintenance, DIY watch modification
Quantity: Multiple mixed size packs available (refer to listing images for options)
## Warm Tips
Images are for demonstration only, please refer to the specifications for exact size information.
Minor size deviation is allowed due to manual measurement.
Actual product is silver stainless steel, slight color difference may occur on different display screens.
The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.
No-delivery refund
