StrongArm™ Liftgate Lift Support by RhinoPac®. Body Connection: Captive Ball, Nylon Socket. Shaft Connection: Captive Ball, Nylon Socket. Compressed Length: 12.78″. Extended Length: 19.93″. Travel Length: 7.15″. Capacity: 146 Lbs. RhinoPac products are a unique combination of top quality and exceptional reliability at a reasonable price. They fit right and deliver extended service.