Car Adjustable Automatic Auto Car Trunk Boot Lid Lifting Spring. Made of high-quality high-carbon alloy steel metal, durable, corrosion-resistant, not easy to deform, and can be used for a long time. Full screw adjustment, anti-break taper limit, reinforced spring hanging ring adjustment range is 15-24 cm (5.91" to 9.45"). Easy to install. Adjust the screws on the spring according to the size of the luggage of different models, so as to facilitate the installation of the fixed spring and adjust the strength to achieve the best opening and closing state. The car trunk cover spring is easy to use after installation, just press the trunk open button lightly, the trunk will open automatically