Models: SL-100, SL-150, SL-300 and SL-600
Nominal depths: 102, 152, 300 and 600 mm
Module width: 300 to 1800 mm
Final assemblies: 6 mm less than nominal dimensions
Galvanised steel outer casing: 1.2 mm (18 gauge)
Galvanised steel louvre blades: 0.71 mm (22 gauge)