[High Quality Suction Cup] Heavy duty heart-shaped aluminum bar with 2 strong suction cup brackets, 220 lbs. weight capacity. Maintains proper height with shopping cart top or window screen. It can fit most vehicles. [Thickened Rotating Foam] With a thickness of 1.1 inches and a length of 14.1 inches, the 360-degree smooth rolling foam pad protects your kayak or boat hull when loading. [Why Slight Shake] Since different car rear windows have different curvatures, the specially designed to match the slight shake between the metal tubes inside the suction cup device allows the suction cup to better fit the angle of the glass, automatically matching it for the best suction effect [Installation Tool] Installation tool is provided. Clean the rear glass with a soft towel (not included) for better suction contact, ensuring the kayak roller is safe when in use. [Easy to Use] The kayak car roller can eliminate the battle match with separate roof boat loading, quickly, simply and smartly load the kayak to the roof. Color: Black + Silver Material: Sponge + Aluminum Alloy Size: Approx. 36x22.5cm Package Contents: 1 x Kayak Roller 2 x Suction Cups 2 x Screws Only the above package contents, other products are not included. Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowable error is +/- 1-3cm.