Profile: Shanghai Aspiring Purification Technology Ltd. is a manufacturer of air purification equipments such as particulate air filters, fan filter modules, ducted modules, roomside replaceable modules, ceiling grid and air shower. Hepa filter is constructed with a 16 gauge galvanized or stainless steel or wooden frame and contain a two-part polyurethane, which assures a positive seal of the media pack & frame. The interlocking frame design with sealant placed behind the top & bottom flange allows unobstructed airflow and ease of filter handling.