6" Pull Out Hatch Cover Deck Plate with Waterproof bag for Boat Kayak Canoe Fish, Rig Material: PVC+ABS,Manufactured of high quality ABS material for long life Outer diameter: Approx 20.5cm / 8.1 inch,Inner diameter: Approx 15.6cm / 6.1 inch,Convenient to install, pull it out easily These Hatch Covers help to reduce UV damage to your hatch as well as minimize the light entering your boat Height: Approx 4.5cm / 1.8 inch;Impact and corrosion resistant Special design with the red waterproof bag, more safety and useful