Sea Dog Deck Plate, Screw out deck plate with clear cover. Injection molded ABS/Polycarbonate. Clear lid allows visual inspecition of watertight compartments, storage lockers and fuel fittings without removing the lid. Use silicone sealant on hull or deckf surface when installing. Lubricate wiht Teflon grease or Vaseline and clean with hot soapy water. Avoid contact with acetone or strong solvents. Color: Black flange, Clear cover, Screw Out. Uses #8 FH fastnener. Measurments: 4", Cutout: 4-1/2", Size Overall: 5-3/4"