---
product_id: 61695983
title: "KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant"
brand: "king scientific"
price: "$42.37"
currency: USD
in_stock: true
reviews_count: 1
url: https://www.desertcart.us/products/61695983-king-scientificrubber-bung-stopper-pack-of-10-21mm-x-24
store_origin: US
region: United States of America
---

# KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant

**Brand:** king scientific
**Price:** $42.37
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant by king scientific
- **How much does it cost?** $42.37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/61695983-king-scientificrubber-bung-stopper-pack-of-10-21mm-x-24)

## Best For

- king scientific enthusiasts

## Why This Product

- Trusted king scientific brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant

## Features

- Pack of 10 rubber stopper
- Conforms to BS2775
- Dimensions quoted are narrow end x wide end x length
- Resistant to dilute acid, alkalies & amonia

## Images

![KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant - Image 1](https://m.media-amazon.com/images/I/41AsssuNHxL.jpg)
![KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant - Image 2](https://m.media-amazon.com/images/I/41ks+2hVEIL.jpg)
![KING SCIENTIFICRubber Bung/Stopper, Pack of 10, 21MM x 24.5MM x 28MM, Waterproof, BS2775 Compliant - Image 3](https://m.media-amazon.com/images/I/41JFg7NY7QL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Perfect for bottle rockets!
  

*by S***N on Reviewed in the United Kingdom on 9 April 2018*

I am a science teacher and I bought these for my students to make bottle rockets. These are the perfect size to act to use stoppers in the opening of a regular water bottle. These ones are very good as they do not allow any of the gas to escape prematurely which means that you get maximum push when the bottle finally launches:)

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**Shop now:** [https://www.desertcart.us/products/61695983-king-scientificrubber-bung-stopper-pack-of-10-21mm-x-24](https://www.desertcart.us/products/61695983-king-scientificrubber-bung-stopper-pack-of-10-21mm-x-24)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-03*