This is just one solid piece.
I need a clean-out hole for my tank.
We do not offer clean-out ports at this time but there are many options online that allow you to install the needed clean-out port.
Example: Dometic Universal Holding Tank Clean-out Kit - we do not sell this item
Example: 8 inch Boat Hatch Cover Deck Plate Hatch,White 8 inch Non Slip Inspection Hatch w/Detachable Cover