F6-H14. EU6-EU10, with separator or not, commonly used in engineering and house ventilation, some of ... densirt fiberboard,2, Grade: F6-H14. EU6-EU10, with separator or not, commonly used in engineering and house ventilation, some of them ... manufacture according to customer's requirement.3, With Aluminum separators or with card paper separators or without separators, according to customer's requirement ...