Scupper valve 2-7/8" dia.

Scupper valve
Provides a water exit for boats with self-bailing cockpits.
Acetal construction. 
Accommodates 3875B thru-transom thru-hull connector (screw holes must be drilled for installation.)
Diameter: 2-7/8”.
Efficiently drains water from self bailing cockpits
Designed to be mounted over existing thru-hull fittings up to 2 inch
Inlcudes retainer ring, screws, rubber flapper valve and gasket.
Can be mounted on transom above waterline or as thru-hull cockpit drain