Standard Sizes:20x20mesh, 20x18 mesh, 18x18 mesh, 18x16 mesh, 18x14 mesh, 16x16 mesh, 16x14 mesh, 14x14 mesh. many colors Fiberglass ... , etc. Standard Sizes:20x20mesh, 20x18 mesh, 18x18 mesh, 18x16 mesh, 18x14 mesh, 16x16 mesh, 16x14 mesh, 14x14 mesh.Color Available: Gray ...