Test Piece

Product Code : SCL-CL-11516

Test Piece (SKU SCL-CL-11516) is an 18 x 180 mm rimless test tube in transparent glass, a step up in volume from the common school size. The extra length and width give room for larger liquid volumes, vigorous reactions and a stopper with a delivery tube, so it is used in secondary school, college and technician chemistry. Science Lab Supplies supplies these tubes from Ambala, India to schools, colleges, training institutes, tender contractors and distributors.

Specifications

The tube measures 18 mm across and 180 mm in length, with a straight rimless mouth and a rounded bottom. Its clear glass lets students follow colour changes and bubbling, and the description lists the glass as chemical resistant and heat resistant for everyday heating and reagent work.

Applications and Experiments for the 18 x 180 mm Test Tube

An 18 x 180 mm test tube is chosen when a reaction needs more space than a standard tube offers, for example when heating a few millilitres of liquid, generating a small volume of gas or fitting a one-hole stopper. It serves Class 9–12 chemistry, B.Sc. practicals and laboratory assistant courses.

• Class 10–12: preparing small quantities of gases such as carbon dioxide and passing them through lime water via a delivery tube.
• Class 9 science: heating mixtures and observing physical and chemical changes with more room for froth or bubbling.
• B.Sc. organic chemistry: small-scale tests and reactions that need a larger liquid volume.

Standard Scope of Supply

You receive rimless 18 x 180 mm glass test tubes exactly as described above, each one a single tube without stopper or rack. Stoppers, clamps, racks and brushes can be added to the order as separate lines, and the pack quantity is confirmed on the quotation.

Packing, MOQ and Lead Time

Science Lab Supplies will quote for a small pack of these tubes or for a complete laboratory quantity. Every quotation spells out the packing, delivery time and price for what you order, and matching racks, clamps and other tube sizes can be included in the same document.

As an exporter registered under an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Nepal, Bangladesh, Zambia, Rwanda, South Africa and Qatar. Science Lab Supplies is registered for GST (GSTIN 06ADEPJ0574F2ZU). Put your requirement in the enquiry cart, message us on the contact page, or check the lab tender page before bidding.

Frequently Asked Questions

When should I use an 18 x 180 mm tube instead of a 16 x 150 mm tube?
Use the larger tube when you need more liquid, more headspace for foaming, or room for a stopper and delivery tube; the 16 x 150 mm size suits quick routine tests.

Can a stopper be fitted to this test tube?
Yes. The rimless top takes a rubber stopper or cork of the right size, including a bored stopper with a glass delivery tube for gas experiments.

Who supplies the 18 x 180 mm Test Piece?
Science Lab Supplies, working from Ambala, India, supplies it to schools, colleges and training centres as well as to contractors and distributors that resell laboratory glassware.

Is heating a stoppered tube safe?
Never heat a tube that is sealed. When using a stopper with a delivery tube, keep the outlet clear and remove the delivery tube from the liquid before stopping heating.

Related Test Tube Sizes and Tools

A well-stocked chemistry bench carries test tubes in several sizes plus the tools to hold and clean them. These four Chemistry Lab items complement the 18 x 180 mm tube and can be added to the same quotation for a complete test tube set.

• Test Piece (16 x 150 mm) — standard size for routine tests.
• Test Piece (25 x 200 mm) — wide tube for bigger volumes.
• Test Tube Clamp — for holding the tube over a flame.
• Brush for Washing Test Tubes — for cleaning after use.

Browse the full Chemistry Lab range or all school lab equipment.

Last updated: 25 September 2026