Dakine 18" ROUND BAR Black Surfboard / SUP / Kayak Roof Car SUV Rack Pad Set with 12' Baja Tie Down Straps Thule Heavy duty 1 3/8" [ 35mm ] cam buckle, Neoprene buckle housing Pads are 18" wide, and the Regular size can fit MOST SQUARE OR ROUND BARS Pads are durable 600D polyester, has hook and loop closures DOES NOT FIT AERO OR FLAT STYLE BARS