New in original package

5.5" round rough in

It will work in many application but They use this brand allot in the floor of the Hurricane deck boats for the fuel cover plate

For A Clean Modern Look On Any Bulkhead

The Beckson 5″ Deck Plate is designed to conceal its mounting fasteners under the quick twist cover. The low profile cover is self-centering, and quickly locks in place with a 1/8 twist. Three separate sealing areas, each designed to chase water away from the plate opening, assure a watertight closure. The bayonet threads are non-jamming, self-cleaning and lift the center for easy removal.  Note: This is not to be walked on.  Perfect for non-load bearing areas with no foot traffic.

Outside Diameter: 7″ (17.8 cm)
Inside Diameter: 5″ (12.7 CM)
Hole Cut: 5 1/2″ (14 CM)