PYREX® Gooch Crucible Adapter, to fit 3650: series Gooch crucibles

Manufactured from 3.3 expansion borosilicate glass complying with ISO 3585 (ASTM E-438 Type 1 Class A), Allows Gooch crucibles to be fitted to a Büchner filter flask? , It is necessary to use a rubber filter cone to secure the Gooch crucible into the adapter funnel