Penny Head Ground Glass Stopper, High Quality Borosilicate Glass
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Penny head ground glass stoppers from LabChoice Australia are designed for a precise, airtight seal in laboratory glassware such as flasks, condensers, and reagent bottles. Their wide, flat “penny head” top allows easy handling and secure closure, even with gloves, ensuring safe and convenient operation in busy lab environments.
Crafted from premium borosilicate glass (BORO 3.3), these stoppers offer excellent thermal stability, chemical resistance, and long-term durability. The precision-ground surface provides an exact fit for standard taper joints, preventing vapour leaks and ensuring reliable sealing performance during heating, cooling, or storage applications.
Manufactured in compliance with ISO 3585 and ASTM E438 standards, LabChoice penny head stoppers combine superior craftsmanship with robust functionality. Trusted by research, educational, and industrial laboratories across Australia, LabChoice Australia delivers dependable BORO 3.3 glassware built for professional scientific use.
Every penny head ground glass stopper supplied by LabChoice Australia undergoes ISO 9001 aligned quality control checks. This includes dimensional verification of the ground taper, clarity assessment, inspection for surface smoothness, and evaluation of sealing performance. Stoppers are examined for uniform contact surfaces, structural integrity and precise finish before packing, ensuring dependable performance across demanding laboratory workflows.