A 20cm or 8 inch (approximate aperture size), non-opening porthole made with a deep spigot in a classic style using traditional methods to shipping industry standards.
A 20cm or 8 inch (approximate aperture size), non-opening porthole made in a classic style, using traditional methods, to shipping industry standards.
A 22.5cm or 8.5 inch (approximate aperture size), non-opening porthole made in a classic style, using traditional methods, to shipping industry standards.
A 26cm or 10 inch (approximate aperture size), non-opening porthole made in a classic style, using traditional methods, to shipping industry standards.
A 12cm or 5 inch (approximate aperture size), non-opening porthole. This type of porthole has a lighter frame making it more suitable for areas and applications where weight is a concern.
A 18cm or 7 inch (approximate aperture size), non-opening porthole. This type of porthole has a lighter frame making it more suitable for areas and applications where weight is a concern.
A 20cm or 8 inch (approximate aperture size), non-opening porthole. This type of porthole has a lighter frame making it more suitable for areas and applications where weight is a concern.
A 24cm or 10 inch (approximate aperture size), non-opening porthole. This type of porthole has a lighter frame making it more suitable for areas and applications where weight is a concern.
