... Material:fiber class and chemical fiber or corrugated paper.Place of Origin:Henan China (Mainland)Brand ... , high tempreture resistance and shock-resistance, or card paper, galvanized steel, medium densirt fiberboard,2, Grade: ... .3, With Aluminum separators or with card paper separators or without separators, according to customer' ... V-type F7-H10 high efficiency pleated hepa filter for purification