Everbilt 1 in. x 1 in. x 1/8 in. x 48 in. Aluminum Trim Channel 800177 - The Home Depot
Everbilt 3/8 in. W x 1/2 in. H x 96 in. L Aluminum C-Channel with 1/16 in. Thick 800547 - The Home Depot
Aluminum Channel - 1/2" Leg x 1" OD x 7/8" ID x 1/16" Wall - Eagle Aluminum
Speedy Metals 2" x 1" x 1/8" 6063 Aluminum Channel
Aluminum Hat Channel - 3" x 7/8" Tall - Eagle Aluminum
7/8'' x 7/8'' x 1/8" Aluminium Channel - 1st Choice Metals
Outwater Mill Finish 7/8'' Inside Dimension Aluminum U-channel 36'' Length (pack Of 4) Alu357-m C-channel in the Furniture Moulding department at Lowes.com