Representative Image

DWK Flask, 25 mL Pyrex Narrow Neck Borosilicate Glass Graduated, Pack of 12

Bottom Ø

Height

Neck Ø

Nominal capacity

Specifications

Compare models
HS Code #
70172000
Bottom Ø
41 mm
Height
65 mm
Neck Ø
13 mm
Nominal capacity
25 ml
UNSPSC
41121804

Alternative in-stock items

$370.32

Inc. GST

Available soon

Product description

The DWK Flask, 25 mL Pyrex Narrow Neck Borosilicate Glass Graduated, Pack of 12 is designed for precise measurements and reliable laboratory use. Made from high-quality borosilicate glass, these flasks are resistant to thermal shock, making them perfect for a wide range of applications in chemical and biological laboratories. The narrow neck design helps minimize evaporation and ensures accurate liquid handling. This set includes 12 flasks, ideal for laboratory settings where durability and precision are essential.

Key Features:

  • Brand: DWK
  • Material: Pyrex borosilicate glass for high resistance to thermal shock
  • Capacity: 25 mL
  • Design: Narrow neck to minimize evaporation and for precise liquid handling
  • Packaging: Pack of 12 flasks
  • Application: Ideal for chemical, biological, and analytical laboratory use

This set of graduated flasks is an essential tool for labs requiring durable and accurate measuring instruments for a variety of applications.

Downloads

Compare similar models

Flask 25 ml, Pyrex, narrow neck borosilicate glass, graduated pack of 12

Manufacturer P/N

4980-25

Part Number

6.239 602

Manufacturer

DWK Life Sciences​

Bottom Ø

41 mm

Flask 50 ml, Pyrex, narrow neck borosilicate glass, graduated pack of 12

Manufacturer P/N

4980-50

Part Number

6.239 603

Manufacturer

DWK Life Sciences​

Bottom Ø

51 mm

Flask 2000 ml, Pyrex, narrow neck borosilicate glass, graduated

Manufacturer P/N

4980-2L

Part Number

6.252 682

Manufacturer

DWK Life Sciences​

Bottom Ø

160 mm

Flask 125 ml, Pyrex, narrow neck borosilicate glass, graduated pack of 12

Manufacturer P/N

4980-125

Part Number

7.930 572

Manufacturer

DWK Life Sciences​

Bottom Ø

67 mm

Flask 250 ml, Pyrex, narrow neck borosilicate glass, graduated, pack of 12

Manufacturer P/N

4980-250

Part Number

6.239 599

Manufacturer

DWK Life Sciences​

Bottom Ø

82 mm

Flask 1000 ml, Pyrex, narrow neck borosilicate glass, graduated pack of 6

Manufacturer P/N

4980-1L

Part Number

6.239 601

Manufacturer

DWK Life Sciences​

Bottom Ø

129 mm

Flask 500 ml, Pyrex, narrow neck borosilicate glass, graduated pack of 6

Manufacturer P/N

4980-500

Part Number

6.239 600

Manufacturer

DWK Life Sciences​

Bottom Ø

101 mm

Flask 4000 ml, Pyrex, narrow neck borosilicate glass, graduated

Manufacturer P/N

4980-4L

Part Number

6.254 929

Manufacturer

DWK Life Sciences​

Bottom Ø

206 mm

Flask 6000 ml, Pyrex, narrow neck borosilicate glass, graduated

Manufacturer P/N

4980-6L

Part Number

6.254 930

Manufacturer

DWK Life Sciences​

Bottom Ø

235 mm

Frequently asked questions

It is designed for precise measurements and reliable laboratory use. Made from high-quality borosilicate glass, these flasks are resistant to thermal shock, making them perfect for a wide range of applications in chemical and biological laboratories. The narrow neck design helps minimize evaporation and ensures accurate liquid handling. This set includes 12 flasks, ideal for laboratory settings where durability and precision are essential.

Insights

Explore
Burette vs Pipette: Key Differences and Which to Use

4 mins read

Burette vs Pipette: Key Differences and Which to Use

This guide explains the practical difference between a burette and a pipette, two instruments that are often confused because both dispense measured volumes of liquid, but that are built for genuinely different jobs. It breaks down how a burette's stopcock and full-length graduated scale let an operator dispense a variable, watched volume and stop the instant a reaction reaches its endpoint, versus how a pipette (volumetric, graduated or micropipette) is built to transfer one known or pre-set volume in a single action. Rather than presenting the two as competing options, the piece frames them as complementary tools tied to different steps in a procedure: burettes for titration and any reaction where the target volume isn't known in advance, pipettes for sample preparation, dilutions and any step where the volume is already fixed.

Read full story
Top 5 Brands for Graduated Cylinders in 2026

4 mins read

Top 5 Brands for Graduated Cylinders in 2026

This guide compares the five graduated cylinder brands most commonly used across Australian laboratories: Hirschmann Laborgeräte (DURAN® glass), Kartell (PMP plastic), ISOLAB Laborgeräte, BRAND (BLAUBRAND®) and VITLAB. Rather than treating graduated cylinders as interchangeable, it breaks down what actually separates them, Class A versus Class B accuracy tolerances, glass versus plastic construction, base stability and certification standards such as USP conformity, and explains which of these differences genuinely matter depending on the work.

Read full story
Top 5 Brands for Erlenmeyer Flasks in 2026

4 mins read

Top 5 Brands for Erlenmeyer Flasks in 2026

This guide compares the five Erlenmeyer flask brands most commonly used across Australian laboratories today: DWK Life Sciences (DURAN®), ISOLAB Laborgeräte, LLG Labware, BRAND and Kartell. Rather than treating all Erlenmeyer flasks as interchangeable, it breaks down what actually separates them in practice, wall thickness consistency, thermal shock resistance, neck and closure compatibility, and material choice between borosilicate glass and polypropylene, and explains which of these differences matter for which kind of lab work.

Read full story