Long stem Funnel
Product Code : EL-F-10112
Quick answer: The Long Stem Funnel is a chemical- and heat-resistant borosilicate glass funnel with a 60° bowl angle sized for a precise fit with standard filter paper, and a longer stem (approximately 150mm) that reaches well into narrow-neck receiving vessels during filtration.
| Specification | Detail |
|---|---|
| Product | Long Stem Funnel |
| Material | Pyrex-type borosilicate glass, chemical and heat resistant |
| Bowl angle | 60°, for precise fitting of filter paper |
| Stem length | Approximately 150mm |
| Top external diameter | 70mm, 80mm, 105mm |
| Stem outer diameter | 8mm |
Why Stem Length Matters in Filtration
A longer stem lets the funnel's outlet sit well below the neck of the receiving flask or bottle, which keeps the filtrate stream running down the inside wall of the vessel rather than splashing — useful when filtering into narrow-neck volumetric flasks or reagent bottles during quantitative work. The 60° bowl angle is the standard angle for a snug fit with folded filter paper, reducing the air gap that can slow filtration or let paper slip. At 8mm stem outer diameter, this funnel pairs well with standard filter-flask stoppers and burette or retort-stand clamps.
Frequently Asked Questions
What is the stem length and why does it matter?
The stem is approximately 150mm long, letting the funnel reach further into the receiving vessel so the filtrate runs down the inner wall instead of splashing.
What top diameters are available?
70mm, 80mm and 105mm top external diameter, to match different filter paper sizes and flow-rate needs.
Is this funnel heat resistant?
Yes, it is manufactured from Pyrex-type borosilicate glass, which is both chemically and heat resistant, suiting routine laboratory filtration work.
Related Products
Explore more from the Funnel range: Funnel, Buchner Funnel Fritted Disc, and the full Laboratory funnel category.
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Last updated: September 2026.