The inside diameter of this cable carrier is 1 inch (25.4 mm) x 0.87 inches (22.1 mm). A cable chain is a chain of links that carry your cables, tubes, hoses and conduit so you don't have the possibility of the these cables and other things catching on parts of the machine. The cable carrier runs along the axis and you will need a little more than half of the axis travel length, depending on how your motion and axis is designed.
To determine the length of cable carrier you will need for a single axis, measure the axis travel of your machine, divide this by 2 and add 12 inches. The radius of the curl is 2 inches. Purchase brackets separately. . If you find a lower price, let us know.