Aluminum Tube - 42.0 x 3.0 mm, Silver aluminum, Klemp
Hillman 1/2-in x 3-ft Mill Finished Aluminum Round Tube in the Tubes department at Lowes.com
OD 3"(76mm), Length 12" (300mm), Straight 3 Inch 6061 Aluminum Pipe Tube Intercooler Pipe High Class Brushed Treatment Air Intake Tube : Amazon.ca: Automotive
3" 16 Gauge Aluminum Tubing
3-1/2-10-Alu 3-1/2" Aluminum Pipe UL 10ft - Ammo International Inc.