Amazon.com : UNISTRUT Genuine P2072ASQ-EG 1-5/8" Square Mount Post Base Strut Mount for All 1-5/8" Single Strut Channel : Tools & Home Improvement
0.812" x 1.625" x 24 inches (3 Pack), Galvanized Steel, Slotted Strut Channel, 14 ga. - Online Metal Supply
Amazon.com: Electriduct Strut Channel Slotted 16-Gauge Stainless Steel C-Profile Metal Framing 1-5/8 x 1-5/8" 2.5 Feet : Industrial & Scientific
Galvanized Steel Products Mild C Type Slotted Steel U Channel Sizes Standard Size of C Purlins Unistrut Channel Price - China Strut Channel, Slotted | Made-in-China.com
Unistrut P1000T-20SS: 1-5/8" x 1-5/8", 12ga Slotted Channel, Type 304 Stainless Steel, 20 Feet
Unistrut P2072ASQ SS Post Base for 1-5/8" Channel, 3.5" Upright - P2072ASQ-SS (Options: Stainless Steel Options: Type 304)