Product description Color: black+red Material: ABS + 304 stainless steel (screw) + nylon (storage bag) + EVA (gasket) Outer diameter: 28cm /11'' Inner diameter: 22.86cm /9'' Note: Transition: 1cm=10mm=0.39inch 1Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 × Deck Hatch 1 × Storage Bag 12 × Screws Features: Made of high quality nylon material, with impact resistance and corrosion resistance. Comes with 12 compatible screws, and the installation is very easy. Convenient and easy to use, follow the signs carved on the cover to open or close it. Special design with the red waterproof bag, more safety and useful. These hatch covers help to reduce damage to your hatch as well as minimize the light entering your boat. Specification: Size: Approx. 28 * 28 * 5.5 cm / 11 * 11 * 2.2 in Weight: Approx. 700g Package List: 1 * Hatch Cover 12 * Screws