Charlotte Pipe 1/2-in x 10-Ft Schedule 40 PVC Pipe in the PVC Pipe & Fittings department at Lowes.com
Amazon.com: Prescott Plastics 1.5" Inch Square Plastic Plug Insert (20 Pack), Black End Cap for Metal Tubing, Fence, Glide Insert for Pipe Post, Chairs and Furniture : Industrial & Scientific
Buy Wholesale China 350mm Pvc Pipe Square Hydroponics 10inch Square Pvc Pipe For Agricultural Planting & Pvc Square Pipe at USD 1 | Global Sources
Formufit 1 in. Furniture Grade PVC 3-Way Elbow in White (4-Pack) F0013WE-WH-4 - The Home Depot
Clear Extruded Acrylic Square Tubing (1/16 : TAP Plastics