Seamax Boat Hatch Cover Black Round Non Slip Inspection Hatch w/Detachable Cover 4" 6" 8"

Please check the size carefully before you buy them, we have 4/6/8 inch three size.

High Quality: Solid ABS material. Weather-tight and O-ring sealed deck plates. Anti-corrosive; Ultraviolet resistant.
Apply to:  Suitable for all kinds of Boats/Yachts. Ideal for interior and exterior applications.
Features: Non-Slip surface, reinforced design with a non-slip surface; 4/6/8 inch deck plate can be installed vertically and horizontally.
Installation: Boat Deck hatch. Rotary witch. Separate cover plate and chassis, easy to install. Pre-drilled countersunk holes (screws included)
4'' Dimensions: Outside Dimensions: 5.5" (141mm); Inside Dimensions: 4"(101.6mm).
6'' Dimensions: Outside Dimensions: 7.7" (196mm); Inside Dimensions: 6"(152mm).
8'' Dimensions: Outside Dimensions: 9.7" (247mm); Inside Dimensions: 8"(203mm).