Ensign mast extrusion. Also available with slots cut and holes drilled, or completely built out. See Ensign Mast, complete, for a built out mast with standing rigging.
Masts are too long to ship via common carrier and usually have to go on our truck when we deliver boats and trailers or go to regattas.
Email firstname.lastname@example.org prior to purchasing a new mast if you are in a rush or concerned about shipping.