Filtration Cones, Natural Rubber

Filtration Cone used to support and seal a filter funnel or crucible within a vacuum filtration assembly. Unlike the smaller jointed glass adapters, these large rubber cones are specifically designed to bridge the gap between a wide, rimmed flask opening and the stem of a heavy Buchner funnel or crucible.

• Material: Flexible, chemical-resistant Natural Rubber 
• Colour: Black
• Design: Tapered, collar-like shape that stretches to fit various funnel stems.
• Function: It acts as a gasket, sealing the gap between the rigid glass funnel stem and the glass filtration cone/flask neck. This prevents air leaks so your vacuum pump can actually pull liquid through the filter.
• Brand: OMSONS
• Product of India

• Glass-to-Glass Protection: Prevents the hard edges of a Buchner funnel from chipping the ground glass socket of your flask.
• Versatility: Unlike rigid glass adapters, one rubber cone can often accommodate slightly different funnel stem diameters.
• Complete Assembly: In a standard setup, you place the rubber cone into the Glass Cone, then seat your funnel into the rubber.