... ,Anti-acid-base, ant-corrosion, high melting point, stable performance,\Water-proof, high strength and can stand the temperature as high ... , high efficient filters, oil waste treatment, water purification equipments, HEPA filters, etc.Weight per square meters ranges from 85g to 120g, applies ... < 110H12120±5high efficient filters high effciency and low resistance air /water filter pp paper