Our Ridge Ready Monkey Bars are designed with four 3.25" oval cups in the front and two in the rear, which sit neatly inside the ridges on your roof for the perfect fit. The Monkey Bars feature round black powder-coated aluminum cross bars; choose between the standard 48" cross bars and the extended 60" cross bars. Either version allows you to easily attach accessories for activities such as kayaking, skiing, surfing and paddle boarding, biking, or hauling cargo.