6063-T52 Aluminum Channel, 0.750" x 0.375" x 0.125" x 48 inches
Speedy Metals 3/4" x 3/4" x 1/8" 6063 Aluminum Channel
UAAC - United Appalachian Aluminum Company-Aluminum C-Channel (2x4) 1 1/2 x 3 1/2 x 1 1/2 x 48 in, 1/16 in thick,.1.5IN, 3.5IN, 4 ft, 2 ft, New, USA!
Outwater Outwater Alu447-Bk Black Finish 3/4 Inch Inside Dimension Aluminum U Channel C Channel 72 Inch Lengths (Pack of 18 Pieces, 108 feet Total) at Lowes.com