Auto Trunk Automatic Lift Tailbox Automatic Lift General Spring Adjustable Booster Pull Modification Automatic opening HIGH-CARBON ALLOY STEEL MATERIAL: Made of high-quality high-carbon alloy steel metal, it is sturdy and durable, anti-corrosion, not easy to deform, and can be used for a long time. ADJUSTABLE LENGTH: Full screw adjustment, anti-break taper limit, reinforced spring hanging ring; the adjustment range is 15-24cm (5.91"to 9.45"). AUTO OPEN: After installation, it is easy to use, just press the trunk open button lightly, and the trunk will open automatically. APPLICATION: The car trunk spring is only suitable for cars without hydraulic levers in the trunk lid. _x000D_ Due to differences in shooting equipment, displays, and production batches, the product may have slight color differences. This is normal, please refer to the actual product. We have tried our best to restore the true color through professional equipment, but we still recommend that you watch it under natural light for the most accurate visual effect.