VEVOR Recessed Manhole Cover 11.8\"x11.8\" Clear Opening, Galvanized Steel Drain Cover Overall Size 14.5\"x14.5\", Sealed Square Manhole Cover and Frame, Steel Man Hole Lid Inspection Access for Boat/Product Features Stylish Appearance These square manhole covers with appealing appearance, smooth in surface. Raised stylish patterns of the steel plate significantly increase the friction when you walk over it. Sturdy Steel Plate The recessed manhole cover made of high quality steel with a sealed plate and frame. The powder coated surface is rigid, durable, rustproof, and anti corrosion. Precise Dimension The inspection cover builds in a precise