Cold Rolled Steel A513 Drawn Over Mandrel Round Tubing, ASTM A513, 1-1/4" OD, 1.01" ID, 0.12" Wall, 72" Length Round metal tubing for transport of fluids and gases and use in automotive and HVAC applications Cold rolled steel for greater yield strength and hardness than hot rolled steel Welded and drawn construction for a smoother bore than welded tubing and a more consistent wall thickness than seamless tubing Meets ASTM A513 specifications for quality assurance