Our elbows are available in 2×3, 3×4, and 4×5 as well as 4″ Round. The 2×3 elbows are manufactured from .019 gauge aluminum, the 3×4 elbows are manufactured in both .019 and heavy duty .024 gauge aluminum, and 4×5 elbows are manufactured from .027 gauge aluminum. We also carry a variety of specialty elbows including brick ledge offsets, Convert-A-bow, Kwikflips, and 45 degree elbows allowing for greater flexibility with those unique applications. All our rectangular elbows come individually wrapped in plastic bags for protection.