Features: This 200pcs Compression Spring Assortment set offers a comprehensive selection of 20 specifications, ensuring you have the perfect spring for any project or repair. Crafted from high quality spring steel, these springs come in various lengths (10mm, 15mm, 20mm, 30mm) and diameters (5mm, 6mm, 7mm), with six different leveling of elasticities to meet mechanical needs. Suitable for DIY enthusiasts, professional mechanics, and hobbyists alike, this spring set is designs to cater to a wide ranges of users seek reliable components for their creations and fixes. Whether you're working on home improvement projects, automotive repairs, or electronic gadgets, these Multifunction springs are essential for applications requiring precise compression force. Each spring in the set is meticulously engineered to provide consistent performances, making it indispensable addition to your toolkit for maintenance, prototypes, and job where Precisions and durability are key. Specifications: Material: spring steel Storage Box: about 30x110x210mm/1.21x4.3x8.3inch Quantity: 7.14x12.7 x 10pc 5.16×20.6x10pc 9.52×15.8x6pc 7.9×28.57x8pc 6.35×10.31x10pc 5.33x25.4x10pc 9.52×19.05x12pc 5.55×17.46x10pc 6.35×22.22x10pc 7.93×31.75x10pc 8.73×46.8x12pc 7.93×44.45x12pc 7.14×50.8x12pc 3.96×79.3x12pc 9.12×34.9x8pc 4.76×44.45x8pc 5.55x38.1x10pc 7.14x38.1x10pc 7.14×19.05x10pc 7.73×36.51x10pc Package Includes: 200pcs Spring Assortment Set note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.