Size: Deck hatch Outer diameter: 20cm /8inch,Inner diameter: 15.5cm /6inch,Bag depth: 28.5cm / 11inch.Adding extra storage for kayak. Kayak hatch made of PVC+ABS, Impact and corrosion resistant, strong and durable. with the red waterproof bag for storage, removable from hatch. Rubber gasket protect hull from damage.Durable lid with locking mechanism.Convenient to install and remove . These Hatch Covers help to reduce UV damage to your hatch as well as minimize the light entering your boat. colour: black Material: PVC+ABS Package Contents: 1 x Kayak hatch 8 x screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.