Flat Bottom Test Tube
Product Code : EL-TT-10151
Lab Glassware Manufacturer supplies the Flat Bottom Test Tube from its manufacturing facility in Ambala, Haryana, to schools, colleges and laboratories across India and export buyers in South Africa, Eswatini and Lesotho and other markets across Southern Africa.
Quick answer: This is a glass test tube with a flat bottom rather than the more common rounded base, available in four outer-diameter-by-length sizes — 12×75mm, 14×110mm, 18×55mm and 18×138mm — and is able to stand upright on a bench without a rack or stand.
| O.D. × Length |
|---|
| 12 × 75mm |
| 14 × 110mm |
| 18 × 55mm |
| 18 × 138mm |
Why Choose a Flat Bottom Over a Round Bottom Test Tube
A flat-bottom test tube can be stood upright directly on a benchtop or in a simple tray without needing a rack to hold it steady, which is convenient for quick, informal observation, short-term sample holding, or classroom demonstrations where reaching for a rack for every tube slows things down. A round-bottom tube, by contrast, must always be held in a rack, clamp or stand since it cannot stand on its own. The trade-off is that a flat bottom is less commonly used for direct heating over a flame, where a round bottom's more even heat distribution and lower stress concentration are usually preferred — so flat-bottom tubes tend to suit observation, short-term storage and general bench use rather than routine heating work.
Frequently Asked Questions
What sizes are available for this flat bottom test tube?
It is available in four sizes measured as outer diameter by length: 12x75mm, 14x110mm, 18x55mm and 18x138mm.
Can a flat bottom test tube stand upright on its own?
Yes, that is the main practical advantage of a flat bottom — it can stand on a benchtop or tray without a rack, unlike a round-bottom tube which always needs support.
Is a flat bottom test tube suitable for heating over a flame?
Flat-bottom tubes are generally better suited to observation, short-term storage and general bench use rather than direct flame heating, where a round-bottom tube's more even heat distribution is usually preferred.
Can this be supplied for bulk, tender or export orders?
Yes. It is supplied in bulk to schools, colleges and laboratories in India and is exported to distributor and institutional buyers, including recent enquiries from Southern African markets such as South Africa, Eswatini and Lesotho. Share required sizes, quantity and destination country through Contact Us or the Tenders page for a quotation.
Related Products
Explore other Test Tube range items: Reusable Test Tube and Tubes Culture Round Bottom, or see the full Test Tube range.
Request a Quote
Ready to order the Flat Bottom Test Tube for your laboratory, institution or export order? Contact Us for a quotation, or visit the Tenders page for bulk and institutional procurement.
Last updated: September 2026.