This is for one (1) quality marine grade stainless steel (AISI 316) inspection deck port. This inspection port is a removable deck plate that allows you to access the inside of your hull. Each inspection port is stamped 316 with the makers mark. This port has a 4" inside diameter. The Metric equivalent is generally considered to be 100mm. Not to be used for overhead lifting. AISI 316 stainless is a premium grade of stainless and is considered by many to be best in class. 316 stainless is corrosion resistant and very durable even in the harshest of conditions.
