We stock several thousand different supports supplied from various quality manufactures that are not listed here. If we don't have it we can build many units to your 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. Have an existing support with part numbers on it send us any and all numbers that you can find.Gas Charged Lift Supports are energy storage devices which create force by compressing gas inside a cylinder. Each Lift Supports 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 Amazon. Our primary business is that of lift supports, and we make sure to sell newly produced units. We are so confident with our Lift supports, we offer a Limited Life Time Warranty.