You can use the frame components, like corner connectors, connector plates, in their respective category to connect multiple extrusion bars together to build a frame. M3 nuts will fit in the bars, so you can use those to easily fix plastic pieces to the bar for example. This material is easily cut yourself, making it a versatile product to use.
If you order this product, you will get one piece of 100 cm, mostly packed in a separate package due to the size. We also sell a custom sized bar, which we will cut to size according to your specifications. You can find the custom length products in the studs and bars category.