... centrifugal.pre-filter&ultra-efficiency filter Remove oil,water &dust Precision:0.1um High Efficiency Oil RemovalProduct Introduction:The filter material adopts ... ultra-micro fiber,3 grades of centrifugal,pre-filter & ultra-efficiency filter.It can remove oil,water and dust more ... Water Cooler,HF series High-efficient precision-filter (home made filter housing, Hankison element)etc.Totally 13 series ...