Best Lab Filtering Flasks in 2026

3 Sizes 50ml 100ml 250ml

High quality 3.3 Borosilicate glass, Uniform wall thickness

Extra large marking spot

4pcs of Erlenmeyer flasks 500ml

High quality 3.3 Borosilicate glass, Uniform wall thickness

Extra large marking spot

Used for pressure filtration; or to increase flow rate when some concentrated solutions are slow or difficult to filter under normal pressure

Made of borosilicate glass; capacity: 500 milliliters

Flasks have a narrow mouth and tooled top finish

Used for pressure filtration; or to increase flow rate when some concentrated solutions are slow or difficult to filter under normal pressure

Made of borosilicate glass; capacity: 100 milliliters

Flasks have a narrow mouth and tooled top finish

Clear Material - Made of high quality borosilicate 3.3 glass, it is clear and easy to know the situation, strong and resistant to high temperatures.

Narrow Mouth - The filtering flask is designed to help you reach your perfect drink. With the narrow mouth and top finish, the flask has a smaller opening for filtration.

Large Capacity - Our Filtering Flask has a 500ml capacity, perfect for your chemistry-related needs and tasks, the Filtering Flask offers both a utility and convenience like no other.

Country Of Origin: United States

Model Number: FG5340-2000

Item Package Dimension: 12.599999987148" L x 7.99999999184" W x 6.699999993166" H

PURE SOLUTIONS: The filtering lab flask can be used to separate components or impurities in your mixtures or solutions. The filtration apparatus is built to last with tough, heat resistant borosilicate glass designed to handle boiling liquids and strong vacuums.

FAST FILTERING ACTION: The filtering and distillation kit can be used with or without a vacuum. For faster, higher volume jobs, just hook up a vacuum hose to the filtering flask and quickly pull your solution through the funnel. A lab vacuum filtration apparatus allows you to filter oil and water soluble solutions without damaging or losing heat-sensitive compounds in a distillation. This filtering flask comes with a high quality rubber stopper and aluminum clamp that allow for strong vacuums.

FAST FILTERING ACTION: The filtering and distillation kit can be used with or without a vacuum. For faster, higher volume jobs, just hook up a vacuum hose to the filtering flask and quickly pull your solution through the funnel. A lab vacuum filtration apparatus allows you to filter oil and water soluble solutions without damaging or losing heat-sensitive compounds in a distillation. This filtering flask comes with a high quality rubber stopper and aluminum clamp that allow for strong vacuums.

【HIGH TEMPERATURE RESISTANCE】: Made from industrial quality Borosilicate 3.3 glass, these flasks are built to withstand high temperatures and thermal shock.

【ASTM STANDARD GRADUATIONS】: These flasks feature dual scale graduations per ASTM-E960 standards.

【EASY TO CLEAN】: All United Scientific flasks are dishwasher safe.

250mL CAPACITY || 250mL capacity and easy-to-read white enamel graduations every 50mL

INTEGRAL SIDE ARM || Conical flask with tubulated integral side arm adaptable to 3/8" internal diameter tubing

HEAVY WALL || Heavy wall design for safe use under vacuum pressure

1000ml Glass Filtering Flask with Upper Tubulation.

High quality borosilicate 3.3 glass.

Approx. Height=22 cm. O.D of base = 13 cm. I.D of mouth = 3.4 cm.

1000ml conical filtering flask made from Borosilicate Glass

Integral Side Arm measures 14.2mm long with an inner diameter of 4.6mm and an outer diameter of 8.5mm

For use in storing, mixing, and transferring various solutions

Heavy Duty, 3.3 Borosilicate Glass

2000ml Glass Filtering Flask with Upper Tubulation.

High quality borosilicate 3.3 glass.

Approx Height=285mm.

Made of high quality, heavy duty, Borosilicate 3.3 glass

100ml capacity. White graduations

Beaded rim

Made of high quality borosilicate glass

Conical shape for spill prevention

Integral side arm

1000ml 1L Filtering Flask, Buchner Flask, Vacuum Flask

Heavy-Wall Borosilicate 3.3 Glass

Side-Arm for Easy Push-On Vacuum Hose Connection

Flask Capacity: 1L, 2L and 5L

Barb Size: 12.7mm or 1/2"

Mouth Opening: 36mm to 40mm due to manufacturer fluctuation.

Capacity: 500ml, the medium and adequate ideal one-size-does-it-allflask size

Super Thick and satisfyingly smooth glass flask made with precision

It has a Bolt Neck with Tubulation, best for Filtration setup, distillation setups, and much more. Experiment with this one without a single worry

5000ml Capacity Flask with barbed side arm for filtering

500ml graduations

Heavy boroscilicate glass walls

PURE SOLUTIONS: The filtering lab flask can be used to separate components or impurities in your mixtures or solutions. The filtration apparatus is built to last with tough, heat resistant borosilicate beaker glass designed to handle boiling liquids and strong vacuums. The glass is packaged tightly and thoroughly inspected to guarantee you receive an unblemished product.

LAB QUALITY, MANY USES: Use the 2000mL filtering flask for chemistry experiments in the lab or school; to make e-juice, distilling, concentrate and oils; to filter essential oils and plant extracts; to make soap; and more!

FAST FILTERING ACTION: The filtering and distillation kit can be used with or without a vacuum. For faster, higher volume jobs, just hook up a vacuum hose to the filtering flask and quickly pull your solution through the funnel. A lab vacuum filtration apparatus allows you to filter oil and water soluble solutions without damaging or losing heat-sensitive compounds in a distillation. This filtering flask comes with a high quality rubber stopper and aluminum clamp that allow for strong vacuums.

Leakproof

Optically clear

Shatterproof

50mL Capacity: 6pcs of 50ml lab glass Erlenmeyer conical flasks in total.

Industrial Strength: These flasks are made of 3.3 Borosilicate glass material, uniform wall thickness, high quality and heavy duty.

Conical Type and Narrow Mouth: These flasks are narrow mouth in conical type, with printed graduation and extra large marking spot.

Used for pressure filtration; or to increase flow rate when some concentrated solutions are slow or difficult to filter under normal pressure

Made of borosilicate glass; capacity: 50 milliliters

Flasks have a narrow mouth and tooled top finish