Straight hard temper copper tubing used in plumbing, mechanical, and DWV applications. Streamline Copper Tube sets the standard for quality, consistency and service in the plumbing industries. Tube Size 3 inch, Inside Dia. 3 inch, Outside Dia. 3-1/8 In, Wall Thickness 0.045 inch, Max. Pressure 159 psi with tube length 10 ft.