Advantage: More tough and tensile Higher strength Orderliness and accurate screen caves Symmetrical character Quality conformity Safely operation and long-term use Longer life screen Good dye output and osmotic function Good Conglutination function of photosensitive medicament Symmetrical color and beautiful pattern Perimeter accurte The norms of the circular screen: Girth (mm):640,688,819,914,1018 Length (mm):1450,1680,1780,1980,2080,2650,2950,3050,3500 Mesh Thickness(micron)Open Area(%) 17 220--225 35--38 25180--185 28--30 40 160--16523--25 60120--12516--18 80 110--11514--16 100 100--10512--14 105100--10514--16 125 100--105 12--14 155 100--105 12--14and ect.