The Rectangular Lower Link/Tube Kit updates various Mobile Elevated Work Platforms (MEWPs) with rectangular lower JIB arms instead of the previous round assembly. The kit includes (2)two bottom tube welds, (2) two bottom pins, and hardware for assembly. For use on models: 460SJ, 660SJ, 600 AJ, 860SJ and 800AJ. Please confirm the serial number range for your machine.