Standard Sizes:20x20mesh, 20x18 mesh, 18x18 mesh, 18x16 mesh, 18x14 mesh, 16x16 ... insect screen makes ideal material in industrial and agricultural buildings to keep away fly, mosquito and small insects or for the purpose ... resistance, easy cleaning, good ventilation, high strength, stable structure, etc. Standard Sizes:20x20mesh, 20x18 mesh, 18x18 mesh, 18x16 mesh, 18x14 mesh, 16x16 ...