Professional Silicone Rubber Parts Manufacturers

Stopper sizes

Stoppers or also known as bung plugs are an essential equipment that you often forget when we talk about laboratory equipment. When we say laboratory, you always think of eprouvettes, Erlenmeyer, metallic stands, torches, scales, and thermometers. But these stoppers or bungs are as important as the previously mentioned objects. Just make sure you choose the right stopper sizes if you want the best outcome.

They are made to tight seal the glass made equipment and not to let the chemical escape from the glassware whether that is a liquid or a gas. Also, they are used to help the brewing process of the alcohol because when it ferments it releases gas and if you let that gas collect you might have an explosion in your brewery. 

There are a variety of stopper sizes available on the market. Also, there are different types such as: without holes when you need them just like a cap, with one hole if you need to put something in the container like an indicator, or with two holes to help the process of distillation and extraction of gasses. You should use the two-holed stoppers to make a whole circulation for your experiment. The material that these stoppers are made from is usually rubber since it is elastic and can fit tightly on the opening of the glassware. 

When it comes to stopper sizes, there are many that you can choose from but before that, you will need to measure the hole that you will try to put the stopper in. The diameter of the hole is the first thing you need to measure, then you will need to measure the height of the neck on the eprouvette or other glass-made container. The diameter of the hole inside the stopper is your third dimension and that is the thickness of the pipe that you will try to connect the glass with. 

When you have collected all these measurements you will open the site of the manufacturer and you will find sizes starting from 1 and scaling further. If you do not find the right dimensions, they can be custom-made for you in order to make your laboratory or alcohol brewing process perfect.

Our Products

  • Material: EPDM/NR/SBR/Silicone/FKM/NBR/CR
  • Hardness: 30-90 Shore A
  • Temperature Rang: -70℃ to 220℃, we can customize products with a temperature resistance of more than 300℃.
  • Colors: Black,White Or according to the Pantone NO#.
  • Custom service available, we can offer special plugs according to your requirements.

Do you need a quote? Or need to place an order?
We also provide customized services, and can make various non-standard silicone rubber parts according to your drawings or samples.
Welcome to contact us for more information!