This profile combines the standard Line 8 groove with a particularly lightweight design. item aluminium profiles with Line 8 grooves are used around the world as the basic building blocks for machines and factory equipment. However, structures that are designed for light use don’t need the full load-carrying capacity of these profiles. Thanks to its hollow cavities, Profile 8 40x40 E is particularly light, but still features four standard Line 8 grooves for a range of fastening options.