Areoscreen PS-D series, system with double sided perforated skins.
There are 3 sizes within the range:
> PS-D300 (303 mm wide)
> PS-D400 (403mm wide)
> PS-D600 (600mm wide)
See below the typical sections of the profile.

PS-D400 (Sample)

PS-D Bicycle Museum

PS-D Bicycle Museum