I do NOT have any pipe for sale.
This mount lies between two pipes that are approx. 3 1/4 inches apart so you can mount heavy items to your creation, such as wheels, machines, table tops, etc.
NOTE: See fifth photo for example. Two EF-1000A are on top in this photo, on the bottom (between the wheel and the pipe are EF-1002F brackets, which provide a flat surface to mount to.