Features: 200pcs spring kit include 20kinds of compression and extension springs of different sizes; This springs set is a must-have for any DIY enthusiasts or professional mechanic, providing a comprehensive range of sizes to all needs Made from high-quality steel, these springs are durable and reliable, with excellent elasticity and resistance to rust and corrosion. This set is perfect for repairing or replacing broken or worn-out springs. Packed in a clear plastic case for easy storage and organization Specifications: Material:Steel Compression Spring Size:7x13mm/0.28x0.51in(10pcs),6x12mm/0.24x0.47in(10pcs),5.5x27mm/0.22x1.06in(10pcs),9.5x16mm/0.37x0.63in(6pcs),9x18mm/0.35x0.71in(12pcs),9x35mm/0.35x1.38in(8pcs),5.5x38mm/0.22x1.5in(10pcs),7x19mm/0.28x0.75in(10pcs) Extension Spring Size:5x10mm/0.2x0.39in(10pcs),5.5x14mm/0.22x0.55in(10pcs),6x10mm/0.24x0.39in(10pcs),8x13mm/0.31x0.51in(8pcs),7.5x17mm/0.3x0.67in(10pcs),8.5x26mm/0.33x1.02in(12pcs),8x50mm/0.31x1.97in(12pcs), 7x55mm/0.28x2.17in(12pcs),4x70mm/0.16x2.76in(12pcs),5x34mm/0.2x1.34in(8pcs),7x25mm/0.28x0.98in(10pcs),8x23mm/0.31x0.91(10pcs) Storage Box Size:Approx.110x210x30mm/4.33x8.26x1.18in Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1set Spring Assortment (200pcs)