1/2"x1/2" mesh, 19 gauge galvanized after welded wire (GAW) mesh and fence will last a long time. After the 19 gauge wire is welded into a 1/2"x1/2" mesh, it is dipped into a bath of molten zinc. The entire mesh, including the welded areas, is thoroughly sealed and protected against rust and corrosion. This material is lighter in weight and strength than the 16 gauge 1/2"x1/2" mesh and therefore costs less. Particularly useful for animal enclosures or other applications where a light mesh, rust prevention and long life are desired. It can be used as a low cost flooring for chukar pens, though we recommend the heavier 16 gauge material. It is also useful as a barrier for critter exclusion.