Product Specifications: The borders are made from a specialised, mill grade aluminium that is approximately 0.55mm thick.They are treated with a non-chromate treatment which prepares the surface for subsequent priming and painting or powder coating.
Painting or powder coating is recommended as without it borders are porous and
surface scratches may be present as a result of the manufacturing
process.Under borders have two flat edges for installation of panels on both sides. Over borders have one flat edge for installation of the panel and a top finished edge.