... : 2100mm Length: no limited 2) Thickness: from 3mm to 18mm Clear Polycarbonate Sheet for swimming pool cover Specifications:1) Thickness: 4mm ... , 2.1, 2.5, 2.8, 4.37 5) Colors: clear, lake blue, green, blue, opal, brown, silvery gray, redAPPLICATION:1 ... test of China's National Standard GB8624-97. Belong to B1 level fire retardant, cause neither fire drop nor poisonous gas ...