Finding Correct Support: This listing is for a lid weight of approximately 15 - 20 pounds. To find the right strength for your lid, weigh it using a 2x4 board or other vertical support to hold the lid open. Place the board halfway between the hinge and the front edge, where the support will attach to the lid. Then, place a scale on the ground under the board. Multiply by 1.5 the weight that the scale reads for an estimation of the force support you’ll need. If unsure, please contact us Quality & Efficiency: We provide lift supports for a variety of weights in both individual units and multi-packs. For example, if your lid weighs 100 lbs., then you will most likely need two (2) 150-lbs lift supports (Do not combine the pressure of the 2 supports). This listing includes 2 Universal Lift Supports designed for optimal functionality. Again, if unsure, please contact us and we can help with clarification High Quality Supports, designed to last, and meet or exceed OEM specifications Durable and Precision-Engineered: Experience top-notch quality with high-quality supports that are meticulously designed to last and meet or exceed OEM specifications Measurement:Extended Length from Center Mount to Center Mount is 12.0 in.This lift support offers exceptional support, ensuring the stability and functionality of your replacement components Lift Supports Depot SX120PSS30 are high quality props. These auto parts are optimally designed to with longevity in mind, giving you peace of mind that when you open your car or trucks universal stainless steel it'll stay open! Lift Supports Depot specializes in designing automotive lift supports that will last a long time! Buy with confidence!