Rubber Stoppers of Various Diameters with Holes
Product Code : SCL-CL-11546
Rubber Stoppers of Various Diameters with Holes (SKU SCL-CL-11546) are round, bored rubber corks that close a test tube or flask while letting a glass delivery tube, thermometer or funnel pass through the hole. They are used in gas preparation, distillation and apparatus-building practicals in schools, colleges and teaching labs. Quotations for them are issued by Science Lab Supplies in Ambala, India, for school and college laboratories, training institutes, tender contractors and distributors.
Specifications
The table below gives every specification of the holed stoppers. In short, they are round, chemical-resistant rubber stoppers in four bottom diameters, 11 mm, 13 mm, 14 mm and 15 mm, each with a hole so glass tubing, a thermometer or a funnel can pass through while the vessel stays closed.
| Specification | Value |
|---|---|
| SKU | SCL-CL-11546 |
| Also known as | Bored rubber corks, holed rubber bungs |
| Material | Rubber |
| Chemical resistance | Chemical resistant |
| Shape | Round |
| Bottom diameters | 11 mm, 13 mm, 14 mm, 15 mm |
| Hole | With hole |
| Number of sizes | 4 |
| Use | Laboratory |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Rubber Stoppers with Holes
Holed stoppers turn a test tube or flask into a closed apparatus with an outlet. Students fit a delivery tube to collect a gas, a thermometer to follow a temperature, or a funnel to add liquid, which covers many NCERT gas-preparation activities and college organic set-ups.
- Class 7–10 science: preparing and collecting carbon dioxide, hydrogen or oxygen through a delivery tube, as in the Simple Appliances for Cooking Gas Lighter than Air set.
- Class 11–12 chemistry: fitting tubes and an alcohol-filled glass Laboratory Thermometers (−10 to 100°C) in simple distillation and heating experiments.
- B.Sc. practicals: assembling gas generators, wash bottles and suction set-ups, with a Thistle Funnel passed through the hole to add liquid low in the flask.
- Biology labs: respiration and fermentation experiments using a sealed tube with an outlet.
Wet the glass tube and protect your hand with a cloth when pushing it into the hole; never force dry glass through rubber.
Standard Scope of Supply
The stoppers are supplied with holes in the bottom diameters 11 mm, 13 mm, 14 mm and 15 mm. Tell us which sizes you need and how many of each; the quotation confirms the size mix and pack quantity. Glass tubing is not included.
Packing, MOQ and Lead Time
Stoppers can be quoted by size in small numbers or in bulk for a full laboratory stock. Each quotation specifies the packing, delivery time and price for your quantities, and glass tubes, rubber tubing or flasks can be added so the complete set-up arrives in one shipment.
Science Lab Supplies, a registered exporter with an Importer-Exporter Code, can ship to buyers in Malaysia, Peru, Egypt, Iraq, Nigeria and Kenya. Write the sizes and quantities you need on the contact page or collect them in the enquiry cart; a school or government tender can follow the lab tender page.
Frequently Asked Questions
Which sizes are available?
The stoppers come in bottom diameters of 11 mm, 13 mm, 14 mm and 15 mm. Measure the inner mouth of your tube or flask and choose the size that fits snugly.
What is the hole used for?
The hole takes a glass delivery tube, thermometer or thistle funnel, so the vessel stays closed while gas or liquid passes in or out.
Who supplies these rubber stoppers?
These stoppers are supplied, not made, by Science Lab Supplies. Its Ambala, India office can include them in the same quotation as the rest of a chemistry order for schools, colleges, dealers and tender contractors.
Do you also have stoppers without holes?
Yes. Solid rubber stoppers in the same 11, 13, 14 and 15 mm bottom diameters are a separate item and can be quoted together with these, so closed and outlet versions arrive in one order.
Related Tubing, Stoppers and Electrodes
A holed stopper is only half of a gas-tight joint. The items below supply the solid stoppers, straight and branched glass tubes, flexible tubing, a stopper file and round electrodes that complete gas-preparation, distillation and electrochemistry set-ups, and all can be quoted with the stoppers.
- Rubber Stoppers of Various Diameters Without Holes — solid round stoppers in the same four bottom diameters.
- Stoppers — solid red rubber stoppers from 3 mm to 20 mm.
- Glass Tubes of Different Diameters — 100 mm lengths of glass tube sized 5–6, 6–7, 7–8, 8–9, 10–11 or 12–13 mm across.
- T-Shaped Glass Tubes — 7 mm T-piece for branching a gas line.
- Y-Shaped Glass Tubes — 7 mm Y-piece, chemical and heat resistant.
- Rubber Tube (Laboratory) — natural rubber hose, 9 mm outer and 6 mm inner diameter.
- Metal File for Rubber Stoppers — six removable heads from 3 mm to 20 mm for rubber stoppers.
- Electrodes Round — 6–7 mm round electrodes that fit rubber stoppers with a hole.
Browse the full Chemistry Lab range, the Lab Glassware range for flasks and tubes, or all school lab equipment.
Last updated: 9 October 2026
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