Store › 2-1/2" x 2-1/2" Galvanized Square Tube - 16 gauge - A500 Image 1 of 1 2-1/2" x 2-1/2" Galvanized Square Tube - 16 gauge - A500 from $9.00 OD 2-1/2" x 2-1/2" - ID 2-3/8” x 2-3/8” - Galvanized Square Tube - 16 gauge (0.065” wall thickness) - Grade A-500 Length: Select Length 12" 24" 36" 48" 60" 72" 84" 96" Quantity: Add To Cart Added! OD 2-1/2" x 2-1/2" - ID 2-3/8” x 2-3/8” - Galvanized Square Tube - 16 gauge (0.065” wall thickness) - Grade A-500