Store › 1/2" x 1-1/2" Rectangular Tube - Mild steel - ERW - 16 gauge Image 1 of 1 1/2" x 1-1/2" Rectangular Tube - Mild steel - ERW - 16 gauge from $3.25 OD 1/2" x 1-1/2" - ID 3/8” x 1-3/8” - Rectangular Tube - 16 gauge - ASTM A513 - Mild steel - ERW - Cold Rolled Length: Select Length 12" 24" 36" 48" 60" 72" 84" 96" Quantity: Add To Cart Added! OD 1/2" x 1-1/2" - ID 3/8” x 1-3/8” - Rectangular Tube - 16 gauge - ASTM A513 - Mild steel - ERW - Cold Rolled