Alkali-resistant Fiberglass Mesh opening: 5mm * 5mm, 4mm * 4mm gram per square meter: 60g- ... -100m Fiberglass wire meshStandard Sizes:20x20mesh, 20x18 mesh, 18x18 mesh, 18x16 mesh, 18x14 mesh, 16x16 mesh, 16x14 mesh, 14x14 mesh.Color Available: Gray, black, white, green, yellow ... East of Heping Road, Shijiazhuang, Hebei,China. Alkali-resistant Fiberglass Mesh