... I.Short Description:1.Construction: plank filter 2.Feature: washable 3.Filtration Grade: Pre Filter 4.Delivery: 15~30 ... dust holding capacity 11.Economical and practica II.Technical Datas:Washable air filter,air cleaner G3/G4Application: Filter dust, pre ... foldaway filterFrame: aluminum or galvanized, with dismountable frame designMedia: washable synthetic fiber, can wash 6-8 timesEN779 class: G3,G4 ...