Corning 6220-75 Pyrex Filling Funnel, Top ID (mm): 75, Stem OD (mm): 17 [pack of 1] Review March 12, 2018May 30, 2018 - FilthyMongoose Short stem,for transfersering powders, viscous liquids and filling bottles Top diameter 75 mm., stem diameter 14mm (inner), 16mm (outer)