The aluminum tubing can be polished, but due to the softness of the aluminum, care must be taken not to remove too much material, especially in the area near any welds. Wall Thickness: 16 Gauge. Material: 6061-T6 Aluminum.
HPS 1-3/8" OD 35mm 16 Gauge 6061 Aluminum Straight Tube Pipe Tubing x1 Foot Long
M18 Spherical Plain Bearing, ID 18mm Hole/Bore, OD 35mm, PTFE Lined (GEK18T)
HPS 3" OD 60 Degree Bend 6061 Aluminum Elbow Pipe Tubing 16 Gauge w/ 3" CLR
HPS 120 Degree Aluminum Tube 1.38" (35mm) OD 6"
Breeze TB-138 Standard T Bolt Clamp 1.38", 35mm Min, 1.52", 40mm Max
HPS 304 Stainless Steel 35mm-40mm T-Bolt Hose Clamp for 28mm ID Hose