We stock thousands of different Lift supports supplied from various quality manufactures that are not listed here. If we don't list it chances are we can build yours depending on the specifications. Please contact us with the details of your requirements and we can research to find the best supports suited for your needs. Special lengths, different pressures or ends, send us the information. Some other names that lift supports are know for are Gas Springs, Struts, Cylinders, and Prop Rods. Have an existing support with part numbers on it send us any and all numbers that you can point you to the correct Amazon Listing. Gas Charged Lift Supports are energy storage devices which create force by compressing gas inside a cylinder. Unless shown as a universal, each Lift support listed in this Amazon item is specifically manufactured to OEM specifications for the listed application. Each support is tested to perform as well as the original units and in many cases to exceed the manufactures specification. Lift Supports loose pressure over time, even sitting on shelves in most auto parts stores and many of the inventory liquidators on the web. Our primary business is that of lift supports, and we make sure to sell newly produced units. If unsure of a listing please send contact us and we will be glad to assist.