Features 1、Use to mount your kayaks and canoes on most vehicles. 2、Hard aluminum alloy bars,heavy duty and durable to use. 3、Strong suction cups with locks,provide great grip and prevent scratches on your car glass. 4、High-density thick foam to prevent your kayaks from scratches. Easy solution for a single person to load a boat to the top of car. Features: Use to mount your kayaks and canoes on most vehicles. Hard aluminum alloy bars,heavy duty and to use. Strong suction cups with locks,provide great grip and prevent scratches on your car glass. High-density thick foam to prevent your kayaks from scratches. Specification: Material: Aluminum alloy + Plastic + Foam Size: 74 * 20 * 12 cm / 29.1 * 7.9 * 4.7 in Weight: Approx. 872 g / 1.9 lb Package weight: Approx. 1132 g / 2.5 lb Package List: 1* Kayak Roller NOTE: Please clean the car glass and suction cups to get good suction contact,make sure the boat roller is security before used. Package List 1* Kayak Roller NOTE: Please clean the car glass and suction cups to get good suction contact,make sure the boat roller is security before used.