Cgshop-Compressed Spring Wire Diameter 3.5mm Outer Diameter 21-48mm Length 20-100mmY Type Compression Spring Release Spring Return Spring, 2pcs, Good Elasticity and More Durable(100,21)
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.