20 styles 200 pieces: A variety of springs with different specifications and sizes, including 124 tension springs and 76 compression springs, totaling 200 pieces to meet a range of application needs. Sturdy and durable: Made from zinc-plated spring steel for enhanced durability and consistent performance. Smooth surface, corrosion-resistant, stable and reliable for long-term use. Widely used: Suitable for use in construction, automotive, machinery, electrical appliances, furniture, and other industrial or household applications involving metal components. Convenient storage: Comes with a durable plastic storage box featuring individual compartments to keep each size separated. Includes a size chart on the lid for easy identification, organization, and portability. Extension spring sizes: 5.16x20.6, 6.35x22.2, 5.55x25.4, 7.93x28.5, 7.93x31.7, 8.73x36.5, 7.14x38.1, 8.73x46.8, 7.14x50.8, 7.93x44.4, 4.76x44.4, 3.96x79.3 mm. Compression spring sizes: 6.35x10.3, 7.14x12.7, 5.55x17.4, 7.14x19.05, 9.52x15.8, 9.52x19.05, 9.12x34.9, 5.55x38.1 mm. High-quality materials: Constructed from galvanized spring steel, offering high strength, hardness, and elasticity for reliable tension and compression performance. Organized packaging: Each spring size is clearly separated in the included plastic case, allowing for quick identification and convenient use. Common applications: Ideal for use in bicycles, locks, automotive parts, electronics, hardware, switches, toys, molds, and similar equipment. Note: Use within appropriate load limits to ensure longevity and safety. Specification: Type: Extension and compression springs Material: Galvanized spring steel Color: Silver Weight: 350g Quantity: 200 pcs Included: 124 x Galvanized extension springs: 5.16 x 20.6mm (10 pcs) 6.35 x 22.2mm (10 pcs) 5.55 x 25.4mm (10 pcs) 7.93 x 28.5mm (8 pcs) 7.93 x 31.7mm (10 pcs) 8.73 x 36.5mm (10 pcs) 7.14 x 38.1mm (10 pcs) 8.73 x 46.8mm (12 pcs) 7.14 x 50.8mm (12 pcs) 7.93 x 44.4mm (12 pcs) 4.76 x 44.4mm (8 pcs) 3.96 x 79.3mm (12 pcs) 76 x Galvanized compression springs: 6.35 x 10.3mm (10 pcs) 7.14 x 12.7mm (10 pcs) 5.55 x 17.4mm (10 pcs) 7.14 x 19.05mm (10 pcs) 9.52 x 15.8mm (6 pcs) 9.52 x 19.05mm (12 pcs) 9.12 x 34.9mm (8 pcs) 5.55 x 38.1mm (10 pcs) Package included: 1 x Spring assortment kit (200 pcs) Note: Measurements are manually taken; please allow 1-3mm variation. Color may vary slightly due to lighting and monitor settings. Actual product may differ slightly from images.