Qty (2) StrongArm 6428 Rear Trunk Lift Supports Struts Shocks Springs Props This listing includes 2 Lift Supports For the Trunk. Extended Length from Center Mount to Center Mount is 12.38 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: 6428,817710A000,81771-0A000