---
product_id: 49525245
title: "Rubber Stopper, Size 4, 1 Hole"
brand: "best science supplies"
price: "$2"
currency: MXN
in_stock: false
reviews_count: 1
url: https://www.desertcart.mx/products/49525245-rubber-stopper-size-4-1-hole
store_origin: MX
region: Mexico
---

# Bottom Diameter: 20mm Top Diameter: 25mm Fits 50ml & 100ml flasks Rubber Stopper, Size 4, 1 Hole

**Brand:** best science supplies
**Price:** $2
**Availability:** ❌ Out of Stock

## Summary

> 🔬 Stopper Up! Elevate your lab game with precision and style!

## Quick Answers

- **What is this?** Rubber Stopper, Size 4, 1 Hole by best science supplies
- **How much does it cost?** $2 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/49525245-rubber-stopper-size-4-1-hole)

## Best For

- best science supplies enthusiasts

## Why This Product

- Trusted best science supplies brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Handling:** Lightweight design ensures effortless insertion and removal.
- • **Precision Fit:** Engineered for a snug fit in 50ml and 100ml Erlenmeyer flasks.
- • **Versatile Use:** Perfect for labs, home brewing, or DIY projects.
- • **Durable Material:** Crafted from high-quality rubber for long-lasting performance.
- • **Seamless Sealing:** 5mm hole allows for easy access while maintaining a secure seal.

## Overview

This Size 4 Rubber Stopper features a top diameter of 25mm and a bottom diameter of 20mm, designed to fit both 50ml and 100ml Erlenmeyer flasks. With a 5mm hole, it provides easy access while ensuring a secure seal, making it an essential tool for any laboratory or DIY enthusiast.

## Description

Rubber Stopper, Size 4, 1 Hole

## Features

- Size 4
- Top Diameter: 25mm, Bottom Diameter: 20mm
- Fits 50ml and 100ml erlenmeyer flask
- 5mm hole in stopper

## Images

![Rubber Stopper, Size 4, 1 Hole - Image 1](https://m.media-amazon.com/images/I/412ikQJvJDL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Four Stars
  

*by R***S on Reviewed in the United States on June 13, 2016*

This was just fine but we ordered the wrong size and had to reorder.  Our fault.

---

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**Shop now:** [https://www.desertcart.mx/products/49525245-rubber-stopper-size-4-1-hole](https://www.desertcart.mx/products/49525245-rubber-stopper-size-4-1-hole)

---

*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-21*