Smartmarine 4 inch Boat Hatch Cover Black Round Non Slip Inspection Hatch 4" 6" 8" (4"),Deck Hatch

1).High Quality ➯ Solid ABS material. Weather-tight and O-ring sealed deck plates.Anti-corrosive;Ultraviolet resistant. 2).Apply to ➯ Suitable for all kinds of Boats/Yachts. Ideal for interior and exterior applications. 3).Features ➯ Non-Slip surface,reinforced design with a non-slip surface; 4/6/8 inch deck plate can be installed vertically and horizontally. 4).Dimensions ➯ Outside Dimensions: 5.5" (141mm) ; Inside Dimensions:4"(101.6mm). 5).Installation ➯ Boat Deck hatch. Rotary witch.Separate cover plate and chassis, easy to install.Pre-drilled countersunk holes (screws included)