Outside: 13-1/4″ x 23-1/4″. Cut-Out: 11-3/8″ x 21-1/8″. UV stabilized. Acetone resistant polypropylene. Lid opens a full 180�. Flush-mount design integrates into any vessel. Installs easily and securely. Secure closing lid will not open until you open it. No more components spilling out or hatches bouncing open during heavy conditions. Weather-tight gaskets keep everything dry. Arctic White.