Rubber Filter Aid, 1 Each

The Rubber Filter Aid by United Scientific is a molded rubber disc that supports a filter crucible or funnel in the neck of a filter flask and seals it for vacuum filtration. It has a 32 mm top socket and a 76 mm outer diameter, with a flat bottom that seals tightly against the flask lip. Analytical and teaching labs use it for Gooch crucible and funnel filtration.