Aluminum Slot Rail Frame
 Aluminum Slot Rail frames is widely used for exhibitions, automation frames, display frames, machine frames,material handling frames,
 box frames,workstation frames, etc. It have strong common usage, and you can assemble it by yourself very easy.
 And normal size is from 1 inches, 1.5 inches, or 2 inches square tubes with slot grooves.
 It's really widely used, you can DIY your items with all kinds of slot frames.