Portlights Features:

 
1. CE Approved. Chinese Patent.
2. C.E rated bolt through construction. EPDM gaskets, guaranteed 10 years.
3. 8 and 10 mm tempered glass. Built in drains.
4. You can install a screen in a few easy steps. 
5. Seals without stress and wear on the gasket. 
6. Rapid opening and closing of port .
7. Overall bronze material, high polished surface, easy to clean, corrosion-resistant.
8. Friction hinge allows opening to any position.

 

Porthole is  used for sea-going ship and warships .