Every winterization kit includes a filtering flask, buchner funnel, filter adapter set (set of 7), and medium flow filter paper (Set of 100) . Filtering flasks are from the heavey duty FFB5340 series and are constructed using heavy wall borosilicate glass and include a thick rim and hose bard. Procelain buchner funnels are from the JBF series. In the cannabis industry winterization is known as the process of filtering out unwated wazy plant particles after extraction. The extract and a solution are combined and placed in a freezer overnight. The wazy particles resulting from the freezing procedure are removed using vacuum filtration. This process works best when low temperatures are maintained.