Feature: 1. Easily load your kayak onto your roof rack with the Boat Roller, prevent scratching your love car 2. Two heavy-duty suction cups mount the roller onto your rear window or roof top. 3. The support bar has two different angles it can be positioned in to give you the best angle for loading, and the foam rollers protect the hull. 4. With levers to lock the suction cups into place, the boat roller can be installed and removed quickly. 5. Spend time in your boat, not struggling to get it on your car! 6. The Boat Roller can be used with any vehicle, rack, or carrier, and since you can reposition it, it can help load as many boats as you need to. Specification: Material: High Quality Foam Pad + Aluminum Tube Suction Cup Diameter: 12cm Weight: 1.5kgs Color: Silver Function: Can be used to mount kayaks and canoes on most vehicles. Package: Suction Cup Holder*1 How to Use: 1. Before Installation, Please Clean The Rear Windshield Surface 2. Fix The Suction Cups At Both Ends In The Windshield 3. Settle The Bow Or Stern Of Your Boat Onto The Rollers While Resting The Other End On The Ground 4. Move To The Opposite End Of Your Boat, Lift And Roll, Sliding Your Boat Into Place On Your Bars, Foam Blocks Or Cradles