For penetrating building with the light cable through an easy to manage and weather protected "swan neck" in galvanized steel that is attatched to the roof with bolts. Typically used for tar paper roofs.

Dimensions:
Height: 325 mm (12.8")
Plate: 350 x 350 mm (13.6")
Tube outside diameter: 50 mm (1.97")
Tube inside diameter: 45 mm (1.77")