... . Iso9001 fiberglass filter media / glass fiber filter cloth / fiberglass air filter/ glass fiber felt fiberglass filter media 1. 450-500 ... CLASS PRODUCTION EQUIPMENTOur factory adopted professional filter media production line, filter felt production line and treatment production ... abrasion test, fiber analysis, air permeability, water & oil repellent test, fine dust test, single fiber strength test, ...