0311-861824 54" Bent Upper Tarp Arm for Easy Cover Tarp Systems | Aero OEM Part Item #: 40364 Part #: 0311-861824 This 54-1/8" Bent Upper Swing Arm is a part of the Aero Easy Cover tarp system. Specifically designed to ensure optimal performance, this upper swing arm boasts robust construction thanks to its shape and high-quality aluminum alloy.