The Rohn Heavy-Duty Telescoping Masts are available in 20FT, 30FT, 40FT, or 50FT heights. Each mast is pre-galvanized and comes assembled with hardware. These heavy duty telescoping masts use 1-1/4" 16 gauge galvanized tubing for their top section, while all other sections are 18 gauge. Product Options H20: 20FT Heavy Duty Telescoping Mast - 17lbs, 1-1/2" Bottom O.D., 1-1/4" Top O.D. H30: 30FT Heavy Duty Telescoping Mast - 27lbs, 1-3/4" Bottom O.D., 1-1/4" Top O.D. H40: 40FT Heavy Duty Telescoping Mast - 36lbs, 2" Bottom O.D., 1-1/4" Top O.D. H50: 50FT Heavy Duty Telescoping Mast - 46lbs, 2-1/4" Bottom O.D., 1-1/4" Top O.D. Note: The prices listed include a freight shipping surcharge, due to the length of the product.