T O K G O @ 8 Inch Hole Diameter Deck Plate Kit, deck Hatch with Cat Bag for Kayak Boat Fishing Rigging (Contain Red Pocket) The red bag is removable from hatch. Made of special plastic, very durable. Foam gasket protect hull from damage Personal advice8-inch hatch and non-waterproof cat bag requires 10-inch of flat space to be installed Outside Diameter: 10" Inside Diameter: 8" Products are highly: 1.77" The bag about 11 inch foot deep and Hatch bag is not waterproof. Please confirm the size before ordering.