304 Stainless Steel Square Bar, 1.25" x 1.25" x 24", Cold Finished
1-1/2" Square Metal Bar - Square Metal Stock - Mild Steel - 60" Long (5-ft) | eBay
E00791 Pivotable Stainless Steel Pivotable Connector for 1/2" Bar w/ Set Screws for Square Tube. External diameter 7/8". This INOX Stainless Steel Connector has a pivotable connector and features a 0.01" hole