450-Piece Compression Spring Assortment Kit ? Stainless Steel, 15 Sizes Upgrade your DIY and repair projects with this 450-piece stainless steel compression spring kit, featuring 15 different sizes to meet a variety of needs. ? Premium Anti-Rust Material ? Made from 304 stainless steel, these springs are highly resistant to corrosion, oxidation, and rust, ensuring long-lasting durability. ? Comprehensive Set ? Includes 450 pieces in 15 assorted sizes, covering wire diameters from 0.3mm to 0.5mm and lengths from 10mm to 30mm. ? Easy Organization Storage ? Comes in a transparent, labeled storage box with individual compartments for quick size selection and easy portability. ? Versatile Applications ? Ideal for electronics, 3D printers, pens, tools, mechanical repairs, piano maintenance, toys, scissors, pliers, and more. ? Precision Engineering ? Uniform tension and flexibility make these springs perfect for fine mechanical applications and general home repairs. Included Sizes: Wire O 0.3mm | Outer O 4mm | Length: 10mm ? 30mm (40 pcs per size) Wire O 0.4mm | Outer O 5mm | Length: 10mm ? 30mm (30 pcs per size) Wire O 0.5mm | Outer O 6mm | Length: 10mm ? 30mm (20 pcs per size) Stay prepared for any repair or DIY task with this high-quality, corrosion-resistant compression spring set?a must-have for professionals, hobbyists, and engineers!