Features: A strong spring for 3D Printer Extruder. Excellent elasticity, fatigue resistance. Nickel plated, corrosion resistance, high hardness. Specifications: Material: 45 carbon steel Item color: silver tone Wire diameter: 1.2mm/0.05" Outer diameter: 7.5mm/0.30" Inner diameter: 5mm/0.20" Spring height: 18mm/0.71" Ring quantity: 9 rings Surface Nickel plated No retail package Package Included: 10 Pcsx 3D Printer Extruder Strong Spring
eBay