Avid collector of writing instruments to include fountain pens, mechanical pencils and all sorts of similar gadgets. One example for me is to drop one or more of these inside body of pen to insure pressure on cartridge to prevent leaks. Voilo, magic helping hand.

Cilky 20pcs Small Compressed Spring 304 Stainless Steel Pen Spring, Release Spring 10-30mm ( 0.39"-1.18" ) Length, Outer Diam
4.2
| 25 ratingsPrice: 2.99
Last update: 02-05-2025
About this item
Package Include -- 20pcs x Compressed Spring
Material -- 304 Stainless Steel. High elasticity, smooth surface, anti corrosion and rust ability can provide a durable, reusable and long service life.
Specification -- Wire Diameter x Outer Diameter x Length
Size -- Wire Diameter 0.3/0.4/0.5mm (0.012"/0.016"/0.02"); Outer Diameter 4/5/6mm (0.16"/0.2"/0.24"); Length 10/15/20/25/30mm (0.39"/0.59"/0.79"/0.99"/1.18");
Ideal Choice -- Our Small Compressed Spring are widely used in daily life repairment and maintenance, suitable for electronic products, pens, toys, tools, 3D printer and DIY project.
Durable, high temperature resistant and anti-corrosion, superior longevity.
Material -- 304 Stainless Steel. High elasticity, smooth surface, anti corrosion and rust ability can provide a durable, reusable and long service life.
Specification -- Wire Diameter x Outer Diameter x Length
Size -- Wire Diameter 0.3/0.4/0.5mm (0.012"/0.016"/0.02"); Outer Diameter 4/5/6mm (0.16"/0.2"/0.24"); Length 10/15/20/25/30mm (0.39"/0.59"/0.79"/0.99"/1.18");
Ideal Choice -- Our Small Compressed Spring are widely used in daily life repairment and maintenance, suitable for electronic products, pens, toys, tools, 3D printer and DIY project.
Durable, high temperature resistant and anti-corrosion, superior longevity.