Window screen is made of fiber-glass under the process unifilar plastic-coating, plain weaving, and high temperature fixing. Window screenMesh /inch: 18*18 ... , 16*16, 18*16 Color: black, grey. Width (inch): 24, 30 ... (mesh /inch): 18*18, 16*16, 18*16 Standard Color: black, grey. Standard Width (inch): 24, 30, 32, 36,48,60 ...