Modular T-slot framing stock tubes for use in structural framing systems. These Extrusions and accessories to match, are ideal for building your complete project. These quick connect modular framing systems are perfect for any automation system because the modular framing is like Lego for adults, and can be used to build a wide variety of custom constructions. They come in 48" lengths (4 foot) that works out at $9 per foot. This is the lowest in the industry for Modular Aluminum T-slot framing mechanisms