Qty (2) StrongArm 6663 Liftgate Hatch Tailgate Lift supports W/O Power Gate This listing includes 2 Lift Supports For the Liftgate. Extended Length from Center Mount to Center Mount is 20.68 in. Strong Arm supports use standards of high quality you can trust and use with confidence, they install easily in minutes, often times without special tools required. Includes a Limited Lifetime Warranty! Interchangable with the following OEM Numbers: 158940,6663,74820SZAA11,74820-SZA-A11