Stoppers & Closures
Secure sealing is essential for safe and effective laboratory operations. Our range of stoppers and closures is designed to provide reliable sealing solutions for flasks, bottles, test tubes, and other laboratory glassware. Suitable for research, education, and industrial laboratories, these products help prevent contamination, evaporation, and leakage during storage or experimentation.Manufactured from high-quality glass and durable rubber materials, our stoppers offer chemical resistance and long-lasting performance. Available in multiple sizes and configurations, they are compatible with a wide variety of laboratory apparatus.Whether you require ground glass stoppers for precision joints or rubber corks for general-purpose sealing, our collection meets the practical demands of Australian laboratories. Ensure safe handling, secure containment, and consistent results with dependable laboratory-grade closures.
Cork Ring Support for Round-Bottom Flasks
- Cork ring support for round-bottom flasks
- Also known as a flask base or cork flask ring
- Suitable for supporting round-bottom flasks and dishes
- Made from quality cork as listed
- Well-sanded voids support stable flask positioning
- Parallel sides with concentric bores as listed
- All rings have 30 mm height
- Inside edge has bevelled finish as listed
- Available in multiple sizes for different flask capacities
- Useful for school, university and laboratory glassware handling
- Confirm flask capacity and ring size before ordering
- Use under appropriate laboratory or educational supervision
From AUD 11.40 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
GL45 Pouring Rings, Blue, Pack of 100
- Spare GL45 pouring rings for compatible laboratory bottles
- Designed to help prevent drips when pouring
- Suitable for compatible GL45 reagent bottles
- Made from polypropylene
- Blue colour for easy identification
- Useful as replacement bottle pouring accessories
- Supports cleaner liquid handling during approved workflows
- Supplied as pack of 100 pieces
- Suitable for laboratory, education and chemical storage settings
- Confirm GL45 bottle compatibility before ordering
AUD 31.50 (Ex GST)
GL45 Spare Cap and Pouring Ring, Blue, for Glass Reagent Bottles
- Spare GL45 cap and pouring ring set for glass reagent bottles
- Designed for compatible GL45 laboratory bottles
- Blue cap and pouring ring
- Suitable as replacement bottle closure accessories
- Helps support secure bottle closing and controlled pouring
- Maximum temperature listed as 145°C
- Useful for reagent bottle maintenance and replacement workflows
- Suitable for laboratory, education and general chemical storage settings
- Confirm GL45 thread compatibility before ordering
- Supplied as spare cap and pouring ring only
AUD 1.90 (Ex GST)
Hollow Stoppers, High Quality Borosilicate Glass (BORO 3.3), Heavy Quality
- Lightweight hollow design reduces joint stress
- Precision-ground for airtight, leak-resistant sealing
- Durable and reusable for long-term use
- Ideal for flasks, condensers, and jointed glassware
- Used in chemistry, pharmaceutical, and academic labs
- Made from LabChoice BORO 3.3 glass – High quality
From AUD 2.10 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
Penny Head Ground Glass Stopper, High Quality Borosilicate Glass
- Penny head shape allows easy handling and grip
- Ground glass taper ensures airtight sealing
- Heavy quality glass for durability and lab safety
- Used in reagent bottles, flasks, and tubing ports
- Ideal for chemical storage and sample protection
- Made from LabChoice BORO 3.3 glass – High quality
From AUD 2.00 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
Rubber Cork Stopper, Lab-Grade, High Quality & Reusable
- Flexible rubber ensures tight, leakproof sealing
- Lab-grade material resists chemicals and moisture
- Reusable for repeated sealing and experiment cycles
- Available in multiple sizes to fit common labware
- Used in teaching, research, and industrial settings
- Made from high-quality, durable lab-grade rubber
From AUD 0.68 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
Rubber Stoppers, One Hole for Tubing, Glass Tubes and Apparatus Connections
- One-hole rubber stoppers for laboratory glassware setups
- Suitable for compatible tubing, glass tubes or apparatus connections
- Available sizes include No. 1 to No. 14
- Dimensions listed as T × L × B in millimetres
- Useful for school, university and general laboratory use
- Practical accessory for flask, bottle and test tube sealing workflows
- Central hole supports insertion of compatible tube or fitting
- Flexible rubber construction helps provide a practical seal
- Confirm stopper size, hole size and vessel opening before ordering
- Not suitable for unsupported pressure or vacuum use unless confirmed
- Supplied as selected stopper size only
- Use under appropriate laboratory or educational supervision
From AUD 6.50 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
Silicone Stoppers, Lab-Grade High Quality
- Solid silicone stoppers for compatible laboratory glassware and conical flasks
- High-quality silicone material supports routine laboratory sealing applications
- Designed for high-temperature and chemical-resistant laboratory use
- Tapered stopper profile supports practical fitting into compatible flask necks
- Available in two size options for 250/500 mL and 1000/2000 mL conical flasks
- Top and bottom outside diameters are listed with ±2 mm tolerance
- Suitable for laboratory and educational use under appropriate supervision
From AUD 9.90 (Ex GST)
This product has multiple variants. The options may be chosen on the product page
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Stoppers and closures from LabChoice Australia are designed to provide reliable sealing for laboratory glassware and plasticware used in teaching, research and industrial environments. This category includes rubber stoppers, glass stoppers, hollow stoppers, septa, screw caps, PE stoppers and specialised closures engineered to maintain secure containment of liquids, vapours and reagents during storage, heating, transport and experimental procedures. Each stopper or closure is selected to offer dependable chemical resistance, structural stability and long service life.
Glass stoppers supplied by LabChoice Australia are manufactured from BORO 3.3 borosilicate glass that complies with ISO 3585 and ASTM E438 Type 1 Class A specifications. Precision ground tapers ensure smooth insertion, tight fit and leak resistant sealing when used with compatible glassware. These stoppers provide excellent chemical durability and are ideal for high purity applications, distillation assemblies, reagent storage and controlled reactions that require clean, inert contact surfaces.
Rubber and polymer based stoppers offer flexible sealing options suited to general laboratory work. Materials such as natural rubber, silicone and neoprene provide firm grip, chemical resistance and resilience under repeated compression. Polypropylene and PE closures deliver lightweight, corrosion resistant alternatives for reagent bottles, wash bottles, storage containers and educational laboratory setups. Polypropylene aligns with USP Class VI and ISO 10993 safety testing frameworks, and it naturally conforms to RoHS requirements due to the absence of restricted heavy metals.
Specialised closures such as septa, vacuum stoppers, hollow stoppers and threaded caps are engineered to support analytical workflows, reduced pressure applications and solvent handling. These components are tested for sealing capability, structural strength and dimensional accuracy under ISO 9001 aligned quality control systems. Vacuum capable stoppers undergo pressure retention checks using gauges calibrated to recognised metrology standards.
Each stopper and closure is inspected for clarity, surface finish, fitment accuracy and mechanical integrity before packing. Designed for chemistry teaching laboratories, university research departments, industrial QC facilities and scientific workplaces, LabChoice Australia stoppers and closures provide secure, dependable sealing backed by certified material compliance and consistent quality validation.