What is the meaning of the term "cycle" when referring to the filter used in the D25300D? Support November 17, 2020 15:40 Updated Follow A cycle as referred to in the manual equals every time you fill up the filter and have to empty it. Related articles What tools are compatible with the D25301D dust extractor telescope? What is the inside and outside diameter of the D279055 and 39343 adaptor? Can I get a longer hose for my DWV012 Dust Extractor? Comments 0 comments Please sign in to leave a comment.