Size -- Wire Diameter x Outer Diameter x Length[0.3*4*30mm--(0.012"x0.16"x1.18")] [0.3*4*25mm--(0.012"x0.16"x0.99")] [0.3*4*20mm--(0.012"x0.16"x0.79")] [0.3*4*15mm--(0.012"x0.16"x0.59")] [0.3*4*10mm--(0.012"x0.16"x0.39")][0.4*5*30mm--(0.016"x0.2"x1.18")] [0.4*5*25mm--(0.016"x0.2"x0.99")] [0.4*5*20mm--(0.016"x0.2"x0.79")] [0.4*5*15mm--(0.016"x0.2"x0.59")] [0.4*5*10mm--(0.016"x0.2"x0.39")] [0.5*6*30mm--(0.02"x0.24"x1.18")] [0.5*6*25mm--(0.02"x0.24"x0.99")] [0.5*6*20mm--(0.02"x0.24"x0.79")] [0.5*6*15mm--(0.02"x0.24"x0.59")][0.5*6*10mm--(0.02"x0.24"x0.39")]Package Include -- 20pcs x Compressed SpringMaterial -- 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 LengthSize -- 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.