TriActive USA’s ROWR assumes usage of American standard size tubing, namely 1-1/2” x 3” rectangular tubing x 11ga, 2” x 2” square tubing x 11ga, 1-1/2” OD round tubing x 11ga, 1-1/4” OD round tubing x 11ga, and 1/4” hot rolled flat bar. TriActive USA Fitness Equipment does not include any of the following: exposed cables, hydraulics or plastic seating.