Frame: high quality aluminum
Filter Material: multilayer aluminum net, multi-floor convex network
Thickness: 45mm (2''), 20mm (''), 10mm (1/2'')
Uses: High acid and alkali resistance, high temperature the ventilation system resistance
Efficiency: to block large particles debris
Features: Sturdy and beautiful,  long life and can be washed repeatablely

We, Hengfeng Evergreen Technology Co.,Ltd, are an experienced long history air filter and purifier manufacturer. We constructed our own production plant with full facilities and workers based in mainland China.We are specialized in various of air filters. Our main products include the initial, medium & high efficiency air filter, dust filter, dust bag,gas/liquid filter and whole set of clean equipment which are widely used in automobile, electron, medical,energy, food, building, chemical, tobacco, cement, iron and steel industries.We sincerely hope to work with you together in near future. If you are interested in, pls feel free to contacgt Joannasong82@gmail.com . or more info., please browse our website www.cdkrx.com 

Central air-conditioning filter is used for ventilation equipment of hospital, medical plant, electricity factory.