TriActive USA’s PDIP assumes usage of American standard size tubing, namely 3” x 3” square tubing x 11ga, 3” x 2” rectangular tubing x 11ga, 2” Round Tube 11ga, 1-1/4” OD round tubing x 11ga, ¼” hot rolled flat bar, and 11ga carbon steel sheet metal. TriActive USA Fitness Equipment does not include any of the following: exposed cables, hydraulics or plastic seating.