● Filter φ25mm and φ47mm filter holder, a glass filter (P160) is welded on the filter base. ● All part that contacts the filtrate is made of glass, so it is suitable for filtration of metal analysis, which makes contact with stainless steel. ● There are two types, with suction bottle and suction. ● There is a type of PTFE coating on the outer edge of the funnel and glass filter base (optional). ● The φ47mm rubber cap cannot be sterilized by auto crave.