Representative Image

ISOLAB Stopper NS 12/21 PE

Brand:ISOLAB

Ground size

Specifications

Compare models
Grip disc
Hexagonal
Ground size
NS 12/21
Material
PE
UNSPSC
41122502

$10.63

Inc. GST

Supplier Stock: 14
Delivery: 2-4 weeks

Product description

The ISOLAB Stopper NS 12/21 PE is a durable polyethylene stopper designed to provide a secure seal for laboratory glassware. It is ideal for use with flasks, bottles, and other laboratory containers, preventing leaks and contamination. This stopper offers excellent durability, wear resistance, and ensures a reliable fit, making it an essential tool for various laboratory applications.

Key Features:

  • Brand: ISOLAB Laborgeräte
  • Material: Polyethylene for durability and resistance to wear
  • Size: NS 12/21 for compatibility with laboratory glassware
  • Application: Ideal for sealing laboratory flasks, bottles, and other containers

This stopper provides a secure seal, ensuring safety and reliability during laboratory procedures.

Compare similar models

Stopper NS 12/21, PE
In stock
ISOLAB Stopper NS 12/21 PE

$10.63

Inc. GST

Manufacturer P/N

051.08.012

Part Number

4.672 112

Manufacturer

ISOLAB

Ground size

NS 12/21

Stopper NS 10/19, PE
In stock
ISOLAB Stopper NS 10/19 PE

$10.63

Inc. GST

Manufacturer P/N

051.08.010

Part Number

4.672 110

Manufacturer

ISOLAB

Ground size

NS 10/19

Stopper NS 19/26, PE
In stock
ISOLAB Stopper NS 19/26 PE

$10.63

Inc. GST

Manufacturer P/N

051.08.019

Part Number

4.672 113

Manufacturer

ISOLAB

Ground size

NS 19/26

Stopper NS 14/23, PE
In stock
ISOLAB Stopper NS 14/23 PE

$10.63

Inc. GST

Manufacturer P/N

051.08.014

Part Number

4.672 111

Manufacturer

ISOLAB

Ground size

NS 14/23

Stopper NS 10/19, PE pack of 10
In stock
ISOLAB Stopper NS 10/19 PE, Pack of 10

$24.81

Inc. GST

Manufacturer P/N

051.08.010 VE=10

Part Number

4.678 527

Manufacturer

ISOLAB

Ground size

NS 10/19

Stopper NS 12/21, PE pack of 10
In stock
ISOLAB Stopper NS 12/21 PE, Pack of 10

$24.81

Inc. GST

Manufacturer P/N

051.08.012 VE=10

Part Number

4.678 529

Manufacturer

ISOLAB

Ground size

NS 12/21

Stopper NS 14/23, PE pack of 10
In stock
ISOLAB Stopper NS 14/23 PE, Pack of 10

$24.81

Inc. GST

Manufacturer P/N

051.08.014 VE=10

Part Number

4.678 530

Manufacturer

ISOLAB

Ground size

NS 14/23

Stopper NS 19/26, PE pack of 10
In stock
ISOLAB Stopper NS 19/26 PE, Pack of 10

$26.58

Inc. GST

Manufacturer P/N

051.08.019 VE=10

Part Number

4.678 531

Manufacturer

ISOLAB

Ground size

NS 19/26

Stopper NS 24/29, PE
Available soon
ISOLAB Stopper NS 24/29 PE

$8.86

Inc. GST

Manufacturer P/N

051.08.024

Part Number

4.672 114

Manufacturer

ISOLAB

Ground size

NS 24/29

Stopper NS 29/32, PE
Available soon
ISOLAB Stopper NS 29/32 PE

$15.95

Inc. GST

Manufacturer P/N

051.08.029

Part Number

4.672 115

Manufacturer

ISOLAB

Ground size

NS 29/32

Stopper NS 24/29, PE pack of 10
Available soon
ISOLAB Stopper NS 24/29, PE Pack of 10

$15.95

Inc. GST

Manufacturer P/N

051.08.024 VE=10

Part Number

4.678 528

Manufacturer

ISOLAB

Ground size

NS 24/29

Stopper NS 29/32, PE pack of 10
Available soon
ISOLAB Stopper NS 29/32 PE, Pack of 10

$14.18

Inc. GST

Manufacturer P/N

051.08.029 VE=10

Part Number

4.678 526

Manufacturer

ISOLAB

Ground size

NS 29/32

More items to explore

Stoppers, hollow , HDPE

ProductMaterialAutoclavableMfr#Part#AvailabilityPrice
HDPEYes100/79.230 107In stock$30.12
HDPEYes101/199.230 119In stock$8.86
HDPEYes100/249.230 124In stock$8.86
HDPEYes100/149.230 114In stock$12.40
HDPEYes100/109.230 110In stock$12.40
HDPEYes100/129.230 112In stock$12.40
HDPEYes100/299.230 129In stock$12.40
HDPEYes100/10 VE=104.678 542In stock$24.81
HDPEYes100/12 VE=104.678 543In stock$28.35
HDPEYes100/14 VE=104.678 544In stock$28.35
HDPEYes101/19 VE=104.678 548In stock$14.18
HDPEYes100/24 VE=104.678 545In stock$14.18
HDPEYes100/29 VE=104.678 546In stock$21.26
HDPEYes100/459.230 145$12.40
HDPEYes101/609.230 160$15.95
HDPEYes100/856.078 262$23.03
HDPEYes100/349.230 134$10.63
HDPEYes100/7 VE=104.678 541$17.72
HDPEYes100/45 VE=104.678 547$38.98
HDPEYes101/60 VE=104.678 549$53.16

Rubber stoppers

ProductMaterialBottom ØMfr#Part#AvailabilityPrice
Natural rubber3.5 mm10101039.230 203In stock$10.63
Natural rubber5.0 mm10101059.230 205In stock$10.63
Natural rubber8.0 mm10101089.230 208In stock$14.18
Natural rubber10.5 mm10101109.230 210In stock$14.18
Natural rubber12.5 mm10101129.230 212In stock$19.49
Natural rubber17.0 mm10101179.230 217In stock$10.63
Natural rubber18.0 mm10101189.230 218In stock$10.63
Natural rubber21.0 mm10101219.230 221In stock$15.95
Natural rubber23.0 mm10101239.230 223In stock$10.63
Natural rubber26.0 mm10101269.230 226In stock$12.40
Natural rubber29.0 mm10101299.230 229In stock$14.18
Natural rubber31.0 mm10101319.230 231In stock$19.49
Natural rubber36.0 mm10101369.230 236In stock$12.40
Natural rubber41.0 mm10101419.230 241In stock$15.95
Natural rubber47.0 mm10101479.230 247In stock$21.26
Natural rubber50.5 mm10101509.230 250In stock$26.58
Natural rubber56.0 mm10101569.230 256In stock$12.40
Natural rubber60.0 mm10101609.230 260In stock$15.95
Natural rubber71.0 mm10101719.230 271In stock$23.03
Natural rubber79.0 mm10101799.230 279In stock$31.89
Natural rubber94.0 mm10101949.230 294In stock$40.75
Natural rubber14.0 mm10101149.230 214$21.26
Natural rubber87.0 mm10101879.230 287$37.21
Natural rubber64.5 mm10101649.230 264$17.72

Frequently asked questions

It is a durable polyethylene stopper designed to provide a secure seal for laboratory glassware. It is ideal for use with flasks, bottles, and other laboratory containers, preventing leaks and contamination. This stopper offers excellent durability, wear resistance, and ensures a reliable fit, making it an essential tool for various laboratory applications.

Insights

Explore
Burette vs Pipette: Key Differences and Which to Use

1 min 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

1 min 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

1 min 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

$10.63

Inc. GST