Amazon-US: item helps to reduce ultraviolet damage to your boat and minimize the light entering boat. Features: Lightweight and portable to carry. High quality material, strong and durable. Impact and corrosion resistant. Convenient to install and remove easily. Special design with the bag for storage. The cover to to and the Specifications: Material: Polypropylene + Nylon Inner Diameter: Approx 16.4cm / 6.46inch Outer 20.5cm / 8.07inch Height: 3.5cm / 1.38inch Weight: 271g / 9.56oz Package Size: 27 * 14.8 * 2cm / 10.63 * 5.83 * 0.79in 274g / 9.67oz List: 1 * Deck Plate 8 * Screws Notes: 1, Please allow 1 (0.4 0.8″) differences due to manual measurement, thanks.