The return arms attach to the lower center hub and long/short ribs. Click here for assistance identifying the correct arm or rib.011 | Return Arm (25" or 26")$25.00PriceSize*SelectQuantity*Add to CartDimsReturn Arm (for 10x10): 25.25" x 0.5" x 1" Return Arm (for 8x8): 26.4" x 0.5" x 1" InstallClick for installation instructions, or go to the main Parts page and select "Repair Videos." FAQQ: Where do the 26”/24" return arms go vs the 27”/25" return arms? A: The 26” (24" if 8x8) return arms attach to the center ribs, while the 27” (25" if 8x8) return arms attach to the corner ribs.