3x3 aluminum square tubing Used for engineering and structural applications. 99. 33. is the leading online supplier of Structural Steel such as Carbon Steel Square Tubing like ST3. 6061 T6 Square Tube is stocked in length 288” long. 17-4 Stainless Steel. 000 Width: 3. 531 Availability: In Stock - Ships in 1-3 Business Days SQUARE TUBING Lengths - 20, 24, 30, 36, 40, 48, 60 FT. ): 2. 6061 t6 Square Tube. lizfzihflkgjhhqdcvhdhfbjrigsppavdxotebfqvbtrqvmxhggsnglzlagyqxrhseftejplx