Durable Anti-Rust Material: Crafted from high-quality stainless steel 304 wire, these compression springs are designed to withstand humid environments without rusting. Their robust anti-oxidation, anti-acid, and anti-corrosion properties ensure longevity and reliability in various applications. Convenient Storage and Organization: Each of the 390 compression springs is meticulously organized in a plastic storage box, complete with size labels for easy identification. This thoughtful design allows for quick access and efficient storage, making it ideal for both professionals and DIY enthusiasts. Versatile Applications: With 24 different sizes included in this assortment kit, these springs are perfect for a wide range of home repair tasks. Whether you are working on doors, curtains, bicycles, or electrical equipment, this kit provides the right spring for nearly any project. Assured Quality and Precision: Each spring in this assortment is manufactured with professional design standards, rigorous calculations, and thorough testing, ensuring consistent quality and performance across all sizes. Comprehensive Size Range: The kit includes a variety of sizes, allowing you to select the perfect spring for your specific needs. The dimensions range from 0.018 to 0.0276 inches in wire diameter and various outer diameters and free lengths, accommodating diverse project requirements.