Cgshop-Compressed Spring Diameter 0.3-1mm Outer Diameter 3-12mm Length 300mm Tension Expansion Spring with Ring End, 1pcs, Good Elasticity and More Durable(4mm,0.4mm)
The spring is made of rust-resistant steel, which prevents rust in humid environments and has strong acid resistance, antioxidant properties, and corrosion resistance.
It is widely used for the repair of fountain pens, household appliances, electric motors, factory machinery, lawn mowers, and the like.