Wire cloth works for us every day in our home window screens, letting summer breezes in and keeping insects out. Aluminum is a common material for window screen, specifically dark aluminum to allow for high visibility.  Also, bronze window screen has a long service life, is great for coastal locations due to corrosion resistance, and the bright gold color weathers to a dark charcoal to allow for high visibility.  Other screen fabrics may include stainless steel, galvanized steel, brass, and copper. Stainless steel, plain steel and bronze insect screen is often used in industrial settings for the heat treating of parts.

Typical insect screen mesh has a slight rectangular opening with the following specifications:

Metal
Mesh Count
Wire Diameter
Opening / Open Area
Aluminum18 x 160.011"0.044" x 0.0515" / 65.9%
Bronze18 x 140.011"0.044" x 0.060" / 67.9%
Plain Steel18 x 140.011"0.044" x 0.060" / 67.9%
Stainless Steel18 x 140.011"0.044" x 0.060" / 67.9%