---
product_id: 92371434
title: "United Scientific RSTPK4 Rubber Stopper, 2 to 8 Sizes Assortment, 2-Holes"
brand: "united scientific supplies"
price: "208 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Industrial"
url: https://www.desertcart.ro/products/92371434-united-scientific-rstpk4-rubber-stopper-2-to-8-sizes-assortment
store_origin: RO
region: Romania
---

# United Scientific RSTPK4 Rubber Stopper, 2 to 8 Sizes Assortment, 2-Holes

**Brand:** united scientific supplies
**Price:** 208 Lei
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** United Scientific RSTPK4 Rubber Stopper, 2 to 8 Sizes Assortment, 2-Holes by united scientific supplies
- **How much does it cost?** 208 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/92371434-united-scientific-rstpk4-rubber-stopper-2-to-8-sizes-assortment)

## Best For

- united scientific supplies enthusiasts

## Why This Product

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

## Description

Size:1-(Pack)
            
          
          
        
      
    
  


        
        
     
	       
     

     
                              
     
       	       
        
         
        
        	
        	
        		
        			Convenient assortments of various sizes of rubber stoppers in 1-lb. bags.

## Features

- UNITSCI - RUBBER STOPPER ASSORTMENT, 2-HOLE SIZES, #2 TO #8 , PK1LB

## Images

![United Scientific RSTPK4 Rubber Stopper, 2 to 8 Sizes Assortment, 2-Holes - Image 1](https://images-na.ssl-images-amazon.com/images/I/41u-5N7RDKL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ RSTPK4 Rubber Stoppers, Sizes 2 to 8 - Assortment each has 2-Holes for your tubes from United Scientific
*by C***G on February 19, 2016*

These RSTPK4 Rubber Stoppers, Sizes 2 to 8 - Assortment each has 2-Holes for your tubes from United Scientific and are sized from a smallish #2 which will fit into the hole of a wine bottle completely and won't come out easily, has a small end smaller than a dime (16 mm), #3 whose small end is larger than a penny (18mm) and is even harder to get along with around a wine bottle and a #4's small end is about 20mm and top is 26mm, and this was the first I measured both top and bottom for slope comparisons. #5 is a doosey, in that it is reversed, with the bottom being larger than the top, at 27mm and 22.5mm, strange huh? #6 is the sad sack of this sack of stoppers and is 26 and 31mm. #7 is the sweet one that will probably never get taken advantage of with a measurement of 29-33-37mm. Woowoo! #8 is just boring at 32 and 40mm and as with the others, has two holes for 1/4" tubing.The bag contained 27 stoppers, and I'll let you guess which # it had the most of. Contest rules will determine the winner, based on likes and dislikes of this review.  Occasionally I'll go over board on my reviewing, but when I started this review I guess the smell of the black rubber just was too much for me.  With the holes and all, I would say just plug them if they are not needed.  In the lab, these stoppers are invaluable to the nerds who work there.  Oh, I know they are, but what about me.  These stoppers are Good quality, just not as good as Silicone stoppers, but cheaper and at a List Price: $16.20 where you pay only  $11.79  ($11.79 / EACH bag) and free Shipping for Prime Members, I'd say it is well worth if for 27 stoppers.  There are fewer of some than others.  You Save: $4.41 (27%) off the price of them Retail, as listed.  So, go for it if you are looking to buy one stopper, as I was and was willing to drop the cash. You and I are sad!

### ⭐⭐⭐ Three Stars
*by B***W on March 19, 2018*

I use these for utility purposes, their rubber stoppers, not much to rave about

### ⭐⭐⭐⭐⭐ Standard Flask Stoppers, assorted sizes.
*by D***E on February 7, 2015*

They're rubber, they're stoppers, they have two holes.  What else could you want them to be.  There are a couple of each size included.  I use them to insert 5mm glass tubing, a nice snug fit and seal.

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**Shop now:** [https://www.desertcart.ro/products/92371434-united-scientific-rstpk4-rubber-stopper-2-to-8-sizes-assortment](https://www.desertcart.ro/products/92371434-united-scientific-rstpk4-rubber-stopper-2-to-8-sizes-assortment)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-12*