This Benchtop Filtration Funnel is made of Stainless Steel and has a 10 inch diameter. The filtration funnel has a level spout exit to ensure efficient drainage which means less tilting. The filter paper has a 24 cm diameter. The filter paper is placed inside the filtration funnel then seated with a included stainless steel ring which will hold the filter paper flush with the perforated bottom as well as providing retention. This kit is designed to give max throughput while not sacrificing quality or quantity. This Benchtop Filtration Funnel is a must for every lab that cares about efficiency!