• Borosilicate 3.3 hybex™ glass
• Autoclavable, reusable & breakage resistant
• Permanent enamel graduation markings
• Ideal for shaking, media prep or storage

hybex™ Erlenmeyer Flasks are manufactured from high quality, borosilicate 3.3 glass. A low coefficient of thermal expansion (3.3), provides temperature resistance that is far superior to that of standard lab glass (or soda lime glass). hybex™ glass is designed to withstand high temperatures, making them ideal for shaking applications, media preparation and long-term storage.
The standard Erlenmeyer flasks have permanent, white enamel graduations for volume measurement and a white identification box for marking or coding.

hybex™ Erlenmeyer Flasks with GL45 caps
 
For storage of media and cultures, the capped flasks include an autoclavable polypropylene cap & drip-ring. Optional cap colors are available, as well as PBT material caps for temperature applications up to 180°C. (Threads are standard GL-45 for compatibility with a wide range of cap types from various manufacturers, including phenoic caps, vented caps, etc.)

Specifications

Flasks without Caps:

Flasks with Caps:

Heathrow Scientific® Sibata Micro Volumetric Flask

• Material: Borosilicate Glass
• Includes: Glass Stopper #9

These micro volumetric flasks are precisionmanufactured for accurate and reliable laboratory measurements. Featuring machineblown bodies and heavybeaded, heavytubing necks, each flask is tooled to accept a standard taper glass stopper, ensuring a secure and consistent fit.

Constructed from premium borosilicate glass, these volumetric flasks offer exceptional clarity, excellent chemical resistance, and a low coefficient of thermal expansion for dependable performance.

Each flask is supplied with a matching glass stopper that creates an airtight, leakproof seal to protect sample integrity and enhance measurement accuracy.

Designed to contain (TC) and calibrated at 68°F (20°C), the sharply defined, uniform graduation line ensures precise volume determination. A large marking square allows for clear labeling, while the hexagonal base provides added stability on laboratory benches. These flasks meet ASTM E288 Class A specifications and USP standards, making them ideal for analytical, research, and qualitycontrol laboratories.

Main Attributes

• Made of premium borosilicate glass with a low coefficient of expansion
• Designed to contain (TC); calibrated at 68°F (20°C)
• Sharply defined, uniform graduation line for accurate readings
• Large marking square for easy sample identification
• Includes a standard taper glass stopper (#9) for a leakproof seal
• Hexagonal base for enhanced stability
• Meets ASTM E288 Class A specifications and USP standards for glassware   

Borosilicate Glass Filtering Flasks

• Heavy wall borosilicate filtering flask includes a heavy-duty rim and a bolt neck with tabulation.
• Graduations are printed in durable white enamel.

Specifications 

Heathrow Scientific® Sibata Volumetric Flasks with Glass Stopper

Heathrow Scientific® Sibata Volumetric Flasks with Glass Stopper are precisionmanufactured for accurate and reliable volume measurement in laboratory applications. These volumetric flasks feature machineblown bodies and heavybeaded, heavytubing necks that are expertly tooled to accept standard taper glass stoppers.

Constructed from premium borosilicate glass, these flasks provide exceptional clarity, superior chemical resistance, and a low coefficient of thermal expansion for dependable performance. Each flask is supplied with a matching glass stopper that creates a leakproof, airtight seal, helping to preserve sample integrity while enhancing the accuracy and reliability of volumetric measurements.

Designed to contain (TC) and calibrated at 68°F (20°C), the sharply defined, uniform graduation line ensures precise volume determination. A large marking square allows for easy labeling, and the wide range of available sizes, from 5 mL to 2000 mL, makes these flasks suitable for analytical, research, qualitycontrol, and educational laboratories. These volumetric flasks meet ASTM E288 Class A specifications and USP standards for laboratory glassware.

Main Attributes

• Made of premium borosilicate glass with a low coefficient of expansion
• Designed to contain (TC); calibrated at 68°F (20°C)
• Sharply defined, uniform graduation line for accurate readings
• Large marking square for clear sample identification
• Includes a standard taper glass stopper for a leakproof, airtight seal
• Wide range of sizes available (5 mL to 2000 mL)
• Meets ASTM E288 Class A specifications and USP standards for glassware   

Heathrow Scientific® Sibata Amber Volumetric Flasks with Stopper

• Color: Amber
• Material: Borosilicate Glass

These volumetric flasks are constructed of low-actinic amber glass, providing protection for materials that are sensitive to light. Each flask features machine-blown bodies and heavy-beaded, heavy-tubing necks that are tooled for standard taper glass stoppers. Each volumetric flask is supplied with a standard taper glass stopper, which provides a leakproof seal. This airtight seal not only preserves the integrity of your samples but also enhances the reliability of your volumetric measurements.

Mian Attributes

• Low-actinic amber for light-sensitive materials
• Made of premium borosilicate glass with a low coefficient of expansion
• Designed “to contain” with a temperature of calibration at 68°F (20°C)
• The graduation line is sharply defined and of uniform width
• Each flask has a large marking square and includes a glass stopper
• Wide range of sizes available (10 mL to 1000 mL)
• Meets ASTM E-288 Class A specifications & USP standards for glassware   

Heathrow Scientific® Sibata Volumetric Flasks with Snap Cap

• Material: Borosilicate Glass 

Heathrow Scientific® Sibata Volumetric Flasks with Snap Cap are designed for precise volume measurement and dependable laboratory performance. These high-quality volumetric flasks feature machine-blown bodies and heavybeaded, heavy-tubing necks tooled specifically for a secure snapcap fit.

Constructed from premium borosilicate glass, these flasks offer exceptional clarity, superior chemical resistance, and a low coefficient of thermal expansion for consistent and accurate results. Each volumetric flask is supplied with a durable snap cap that helps protect against spills, contamination, and accidental breakage during handling and storage.

Designed to contain (TC) and calibrated at 68°F (20°C), the sharply defined, uniform graduation line ensures accurate volume determination. A large marking square allows for easy labeling, while a wide range of available sizes, from 10 mL to 1000 mL, provides flexibility for analytical, research, and qualitycontrol laboratory applications. These flasks meet ASTM E288 Class A specifications and USP standards, ensuring reliable, high-precision volumetric performance.

Main Attributes

• Made of premium borosilicate glass with a low coefficient of expansion
• Designed to contain (TC); calibrated at 68°F (20°C)
• Sharply defined, uniform graduation line for accurate readings
• Large marking square for clear sample identification
• Includes a secure snap cap to help protect against spills and breakage
• Wide range of sizes available (10 mL to 1000 mL)
• Meets ASTM E288 Class A specifications and USP standards for glassware   

Volumetric Flasks with ST Stopper, Class A, Batch Certified

• Durable, machine blown body
• Heavy beaded tubing neck
• Feature a sharp graduation line and large white block letters
• Ground glass stopper included
• Meets Class A specifications per ASTM E288

 Specifications
 

Item #	Capacity	Tolerance	Stopper Size
FG5640-5	5 mL	± 0.02 mL	9
FG5640-10	10 mL	± 0.02 mL	9
FG5640-20	20 mL	± 0.03 mL	9
FG5640-25	25 mL	± 0.03 mL	9
FG5640-50	50 mL	± 0.05 mL	9
FG5640-100	100 mL	± 0.08 mL	13
FG5640-200	200 mL	± 0.1 mL	16
FG5640-250	250 mL	± 0.12 mL	16
FG5640-500	500 mL	± 0.2 mL	19
FG5640-1000	1000 mL	± 0.3 mL	22
FG5640-2000	2000 mL	± 0.5 mL	27

 

Borosilicate Glass Erlenmeyer Flasks, Set of 5

Heathrow Scientific® Lead Rings

Heathrow Scientific® Lead Rings are designed to stabilize glassware and lab vessels securely on the benchtop or in water baths. These vinyl-coated lead rings offer a flexible and protective solution for preventing tipping or movement of flasks, beakers, and cylinders during procedures.

The durable vinyl coating protects both your labware and benchtop from scratches, marks, or damage, while the C-shape design option allows for slight manual adjustment to accommodate a range of vessel sizes.

Ideal for labs using water baths or uneven surfaces, these stabilizing rings improve safety and efficiency during experiments. Sold in vibrant blue, they offer easy visibility in busy workspaces.

Key Features

• Stabilizes labware on benchtops or in water baths
• Vinyl-coated lead won’t scratch glassware or lab surfaces
• Ideal for use with flasks, beakers, and graduated cylinders
• Durable, reusable, and easy to clean
• Color: Blue for visibility and organization 

Specifications
 

Item #	Ring Type	Fits Flask Sizes	Inside Diameter	Outside Diameter	Weight
HS8881A	C-Shaped	125 mL to 500 mL	1.9 In. | 4.8 cm	3.0 In. | 7.6 cm	215 g | 0.47 lbs
HS8881B	C-Shaped	250 mL to 1000 mL	2.0 In. | 5.1 cm	3.5 In. | 8.9 cm	465 g | 1.03 lbs
HS8881C	C-Shaped	500 mL to 2000 mL	2.1 In. | 5.3 cm	3.9 In. | 9.9 cm	595 g | 1.31 lbs
HS8881D	C-Shaped	1000 mL to 4000 mL	2.6 In. | 6.6 cm	4.4 In. | 11.2 cm	890 g | 1.96 lbs
HS8882A	O-Shaped	125 mL to 500 mL	1.9 In. | 4.8 cm	3.0 In. | 7.6 cm	210 g | 0.46 lbs
HS8882B	O-Shaped	250 mL to 1000 mL	2.0 In. | 5.1 cm	3.5 In. | 8.9 cm	490 g | 1.08 lbs
HS8882C	O-Shaped	500 mL to 2000 mL	2.2 In. | 5.6 cm	3.9 In. | 9.9 cm	610 g | 1.34 lbs
HS8882D	O-Shaped	1000 mL to 4000 mL	2.8 In. | 7.0 cm	4.5 In. | 11.4 cm	935 g | 2.06 lbs

 

VOLUMETRIC FLASKS, CLASS A, WITH SNAP CAP, BATCH CERTIFIED

• Durable, machine-blown body
• Heavy beaded tubing neck
• Feature a sharp graduation line and large white block letters
• Plastic snap cap is included
• Meets Class A specifications per ASTM E288

ERLENMEYER FLASKS, NARROW MOUTH, BOROSILICATE GLASS

• Designed to give the best combination of thermal shock resistance and physical strength
• Feature heavy-duty rims and graduations in durable white enamel