Amerimax Home Products 1.5 in. x 12 ft. White Aluminum J-Channel Trim 77012 - The Home Depot
Amazon.com: 8020, 1503-LS, 15 Series, 1.5" x 1.5" Tri-Slotted Triple Channel Light Smooth Aluminum Extrusion 80/20 T Slotted Profile (12" Long, Black Anodize) : Industrial & Scientific
35 Pack 4.92FT/1.5M LED Silver Aluminum Channel System,61.8x14 mm U Shape with Milky White Cover,End Caps and Mounting Clips, Aluminum Profile for LED Light Strip Width ≤21.2mm/0.83inch(TX-090) - Amazon.com
GLARESBOT 20Pack 4.92FT/1.5M Silver LED Aluminum Channel System,32.3 * 13mm U Shape with Milky White Cover,End Caps and Mounting Clips Track Profile for LED Light Strip Width ≤10mm/0.39inch(TX-295 - Amazon.com
6061 T6 Aluminum Association Channel | Coremark Metals