These 65mm diameter PYREX funnels have a short wide stem with a 15mm outer diameter opening and are used for transferring powders or filling bottles. Material: Borosilicate Glass Code 7740. Funnel Style: Powder. Stem Outer Diameter: 15mm. Stem Length: 15mm. Height: 83mm. Top Inner Diameter: 65mm. Corning#: 6220-65.