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 16 x 150 mm 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 arranges quotations and delivery of these tubes from Ambala, India, for schools, colleges, training institutes, tender contractors and distributors.

Specifications

Each characteristic of the 18 x 180 mm test tube has its own row in the table. In short, the tube measures 18 mm across and 180 mm in length with a straight rimless mouth; its clear glass lets students follow colour changes and bubbling, and it is 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 cut from Glass Tubes of Different Diameters and joined with Rubber Tube (Laboratory).
• 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). Tube quantities and accessories can be entered in the enquiry cart or sent as a message from the contact page, and bidders will find the tender procedure on the lab tender page.

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?
The tube is sourced from Science Lab Supplies, an Ambala, India business serving schools, colleges and training centres as well as 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, Racks and Stoppers

A chemistry bench that uses test tubes in several sizes also needs racks, holders, stoppers and brushes to store, grip, close and clean them. These Chemistry Lab and Clinical Laboratory items complement the 18 x 180 mm tube and can be added to the same quotation.

• Test Piece (16 x 150 mm) — 16 x 150 mm transparent rimless tube, one size down from this one.
• Test Piece (25 x 200 mm) — 25 x 200 mm rimless transparent glass tube, chemical and heat resistant.
• Test Tube Rack SS — stainless steel rack with 24 positions for 18 mm tubes in 19 mm holes.
• Wooden Handle Brass Test Tube Clamp (Set of 12) — 12 spring-loaded brass holders for 12–25 mm tubes, 160 mm long.
• Rubber Stoppers of Various Diameters with Holes — round chemical-resistant stoppers with a hole, in 11–15 mm sizes.
• Rubber Stoppers of Various Diameters Without Holes — solid round rubber stoppers, 11, 13, 14 and 15 mm bottom diameter.
• Brush for Washing Test Tubes — soft-bristle white nylon brush with a 12 mm diameter.

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

Last updated: 9 October 2026