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