About this item 4 Racks Wide mouth J-bar makes loading and unloading easier.Fit most factory or aftermarket square,oval and flat crossbars 4 Pcs Heavy duty ratchet tie down straps Heavy duty ratchet buckle,Surface electrophoretic treatment with high-strength rust resistance.sturdy saltwater yarn webbing wear- resistant Rubber Pedal & Foam Protector The foam padding and the rubber base cover are made of real rubber and foam. They are Anti-Slip, water and sun resistant Indented Tubing Design Indented tubing design and strong, stable and pre-punched holes.The distance between the cross bar and the roof recommendation be greater than or equal to 2 inch Features A simple, easy install, low-cost solution to carrying your kayak/canoe/SUP paddle.Not applicable to circular Crossbar.If you have any questions, Please provide us with information at any time. Thank you.