Specification: Name: Expansion Spring Extension Tension Springs with Hook Ends Material: A2 304 Stainless Steel Wire Diameter: 2mm Outer Diameter: 12mm - 20mm Length: 40mm - 240mm (According to your choose) Features: Smooth surface; high plasticity, fatigue resistance, good resilience; corrosion resistance, no rust, durable Packing: Plastic bag / Carton box .
eBay