Lab Grade Glass Funnel - 50mm Diameter, 50mm Stem - Premium Borosilicate Glass 3.3 - Eisco Labs Go to amazon.com Related posts Which is the best funnel to fill capsules? FeatureLightweight, premium Borosilicate 3.3 GlassPlain 60 degree angleDiameter 5cmStem length 5cmStem diameter .7cm DescriptionThis high quality, borosilicate glass funnel filter is manufactured with a 60 degree angle. It has a 5 cm diameter and a 5 cm stem length.