Optimally sized J-style carrier creates more useful spaces. Quick on/off hardware ensures fast installation and removal. Heavy Duty Steel Framing with adjustable padding. Durable & Rust Resistant Hardware. 2 PAIRS (4 racks for 2 kayaks). Set of Mounting Accessories. 1 Assembly Instruction. Universal fit for most factory or after-market square/ oval/ flat crossbars. Please check the size, type, and shape to make sure the item is the one that you need. You can use this car roof rack to carry Kayak, Canoe, Suif board, Ski board, Snow Board, SUP, etc. Extra foam padded design to prevent the canoe or kayak from rubbing. Rubber Pedal design to reduce scratch. The crossbar must be at least 1.8 from the height of the roof. The height of the Crossbar must be at least 0.5. This item fits any flat rack bar except a round bar.