Rubber Cone Int. 33/24 – Ext. 39/28mm for Flask Neck 33 (Model 2164)

This durable Rubber Cone Adapter is designed for use with Büchner Funnels as a practical alternative to drilling oversized holes in rubber bungs. The seal is formed around the tapered base of the funnel, not the stem, ensuring a secure and airtight connection during filtration processes.

It is essential to select the cone based on the flask neck size. Suitable for Flask Neck 33, this model features internal dimensions of 33/24mm and external dimensions of 39/28mm. The cone is supplied individually and is ideal for school laboratories, technician prep rooms, and professional filtration setups.

Key Features

• Provides a secure seal for Büchner Funnels without modifying bungs
• Forms seal around the funnel’s tapered base for improved stability
• Compatible with Flask Neck 33
• Internal size: 33/24mm
• External size: 39/28mm
• Ensures airtight performance during vacuum and gravity filtration
• Priced individually

Ideal for School Science Lessons & Laboratory Use

Perfect for KS3, GCSE, and A‑Level chemistry, this rubber cone helps students and technicians set up filtration equipment safely and efficiently. It supports lessons on key scientific techniques and ensures consistent results during practical work.

• Vacuum filtration in organic and inorganic chemistry
• Separation and purification experiments
• Teaching correct technique for reduced‑pressure filtration
• Providing safe, airtight connections for laboratory glassware
• Technician preparation of reliable filtration setups

Strong, practical, and essential for effective filtration, this Rubber Cone Adapter ensures safe and consistent operation in school and professional science laboratories.