Bull's eye weld-in

Opening port. Heavy duty, also intended for installation in the hull.
On the tapered frame of shipbuilding steel, St 37, (material thickness, 10 mm)
is a brass window ring with hinge pins (D = 10 mm)
Seal: Neoprene rubber profile.
Glass: hardened single-pane safety glass (thickness 12 mm).
Made pursuant to ISO (maritime) regulations and CE norms.

Steel screens are available for these ports.