GUANLANG 6 Inch Deck Plate Kit, Deck Hatch with Cat Bag for Kayak Boat Fishing Rigging, Black Material: Made of Special Durable Plastic with non-waterproof cat bag The red bag is removable from hatch EVA gasket protect hull from damage Outside Diameter: 8inch Inside Diameter: 6inch 6-inch hatch and cat bag requires 8-inch of flat space to be installed. (Please confirm the size before ordering)