It is made from fiber glass which is PVC coated single wire produced by plain weaving. It is widely used against fly, mosquito and small insects or for the purpose of ventilation.
1. Size(inch): 20 x 20, 20 x 18, 18 x 18, 18 x 16, 18 x 14, 16 x 16, 16 x 14, 24 x 24. 2. Diameter: 0.011", 0.013".