Non opening windows are designed mainly for mounting (welding or bolting) in walls of superstructure.
Special shaped windows could also be installed in wheelhouse.
Windows are designed according to ISO 3903.
Special shaped windows (trapezoid, parallelogram, etc.) are available.
Glass retaining list can be delivered:
grinded (brushed) P120 to P400 (P120 standard)
polished or high quality polished
painted