This item is 4 feet (48″) in length
While AgraMovers will run on standard 1-5/8″ Square Strut Channel which the ones we sell come pre-drilled and countersunk and are made from extruded aluminum.
Ours are extruded aluminum is more uniform, and AgraMovers do track a little better on them than the steel ones.
There are two reasons for this:
1) The extruded aluminum comes with much thicker walls which provide more surface area for the wheels to ride on, and;
2) An extrusion is more precisely shaped and square, and won’t require straightening to assure a smooth travel of your carrier.