AZLON? Rubber Filer Cones, set of 6

AZLON? Rubber Filer Cones, set of 6
Manufactured from natural rubber
Used to mount a Gooch crucible into a crucible funnel adapter or a B?chner filter funnel onto a filter flask to create a gas tight seal that allows vacuum filtration.
Set comprises 6 different size cones: 15, 22, 28, 36, 42 and 52mm (top I.D.)