Feature:  1. Heavy-duty aluminum frame with protective high-quality foam to prevent scratches and damage when getting your kayak up onto your car.  2. Heavy Duty Aluminum Bars and Strong Suction Cups offer reliable mounting to Car Tops or Car Glass.  3. This boat roller can bear up to 40kg in weight.  4. Wide range of uses-used to install kayaks and canoes on most vehicles by using suction cups on the roof or glass with two different installation angles.  5. Personal loading assistant eliminates the single-person loading battle, fast, simple, and intelligently install the kayak on the roof of the car.     Specification:  Material: aluminum alloy + protective high-quality foam;  Load-bearing: 40kg;  Color: black, silver;  Size: as the picture;     Applicable Type:  All General Motors.     Package included:  1 X Boat Roller.