Amazon.com: Newhouse Electric 1-5/8 in. 14 Gauge Metal Strut Channel with Slotted Back Electro-Galvanized 2ft. (SC14-2-EG),Silver : Industrial & Scientific
0.812" x 1.625" x 36 inches (3 Pack), Galvanized Steel, Slotted Strut Channel, 14 ga. - Online Metal Supply
304 Stainless Steel Half Slotted Metal Framing Strut Channel 10 ft
Superstrut 10 ft. 14-Gauge Half Slotted Metal Framing Strut Channel - Gold Galvanized ZB1400HS 10 - The Home Depot