Glass test tubes with rims are available in several capacities and sizes, so the right choice depends on how much liquid you need to hold and how many tubes you need. EISCO’s 50 mL packs are best for larger batches; its 15 mL option suits smaller samples in bulk. Pyrex offers two distinct dimensions in six-packs, including a 55 mL tube. The products below are made of glass and list rimmed or beaded openings.
| Product | Capacity or dimensions | Best for |
|---|---|---|
| EISCO 16-pack | 50 mL; 5.9 inches tall | Smaller batches of larger tubes |
| Pyrex 13 x 100 mm | 13 x 100 mm | Compact rimmed tubes |
| EISCO 24-pack | 50 mL; 5.9 inches tall | More 50 mL tubes per pack |
| Pyrex 25 x 150 mm | 55 mL; 25 x 150 mm | Larger-diameter tubes |
| EISCO 15 mL 48-pack | 15 mL; 5.25 inches tall | Small-capacity tubes in bulk |
EISCO 50 mL Test Tubes, 16-Pack
These EISCO tubes hold 50 mL each and measure 5.9 inches tall by 1 inch in diameter. They are made from borosilicate 3.3 glass with 1.2 mm walls and fire-polished beaded rims. The listed features include thermal-shock resistance and a rim designed to resist chips and cracks.
Best for: Buyers who need larger-capacity tubes but do not need a 24-piece pack. The combination of 50 mL capacity and a beaded rim makes this a practical choice for general lab or sample-handling needs where those specifications fit.
Limitation: The listed diameter is 1 inch, so check that the tubes fit your rack or holder before ordering.
Pyrex 13 x 100 mm Rimmed Tubes
This Pyrex set contains six borosilicate glass tubes measuring 13 by 100 mm. The product specifies a rimmed top and a round bottom. Capacity is not included in the provided product details, so compare the dimensions with your intended use rather than assuming a particular volume.
Best for: Buyers seeking a compact, dimension-specific tube in a six-pack. Its listed length and diameter make it easier to compare against holders or an existing setup than a product described only by capacity.
Limitation: The listing details provided do not state the capacity or rim finish.
EISCO 50 mL Test Tubes, 24-Pack
This pack has the same listed size and material specifications as the 16-pack: 50 mL capacity, 5.9-inch height, 1-inch diameter, borosilicate 3.3 glass, and 1.2 mm walls. The fire-polished beaded rims are described as chip- and crack-resistant.
Best for: Buyers who need more 50 mL tubes in one pack. Choose this over the 16-pack when the higher quantity better matches your planned workload or replacement needs.
Limitation: The 1-inch diameter may not fit holders designed for narrower tubes; verify holder dimensions first.
Pyrex 25 x 150 mm Test Tubes
This Pyrex six-pack contains 25 x 150 mm borosilicate glass tubes with a stated 55 mL capacity. The product description identifies the rims as beaded and fire-polished. These measurements distinguish the tubes from narrower options, even though the stated capacity is close to the EISCO 50 mL models.
Best for: Buyers who prefer a wider, longer tube and want the capacity specified. Compare the 25 mm diameter with your storage or rack requirements before choosing it over a narrower model.
Limitation: Its 25 mm diameter may be too wide for holders designed for slim tubes.
EISCO 15 mL Test Tubes, 48-Pack
These EISCO tubes hold 15 mL and measure 5.25 inches tall by 0.6 inch in diameter. They are made from borosilicate 3.3 glass with 1.2 mm walls and fire-polished beaded rims. The pack of 48 provides a larger quantity of smaller-capacity tubes than the EISCO 50 mL options.
Best for: Buyers who need many narrow tubes for smaller samples or repeated use. The listed capacity and 0.6-inch diameter make this a better fit than the 50 mL models when space and sample volume are limited.
Limitation: The 15 mL capacity is substantially lower than the 50–55 mL alternatives.
Buying Guide: How To Choose Glass Test Tubes With Rims
What capacity and dimensions do you need?
Start with the amount of liquid each tube must hold. The options here range from 15 mL to 55 mL. Capacity alone does not confirm fit: check height and diameter against your rack, holder, storage space, or process. The EISCO models list both dimensions, while the Pyrex 25 x 150 mm product provides dimensions and capacity.
Why choose a beaded or fire-polished rim?
A rimmed opening describes the tube’s top edge. Some products specifically identify a beaded, fire-polished rim and state that it is designed to resist chips and cracks. If rim finish matters for handling or repeated use, compare the exact listing details. Not every product description provided specifies the same rim treatment.
How many tubes should you buy?
Choose pack size based on how many tubes you need at once and whether you want extras. EISCO offers 16- and 24-packs of the same listed 50 mL size, plus a 48-pack of 15 mL tubes. Pyrex options in this selection are six-packs. Compare quantity alongside capacity and dimensions, not by pack count alone.
Does borosilicate glass matter?
All five selections identify borosilicate glass. EISCO specifies borosilicate 3.3 and lists thermal-shock resistance for its 1.2 mm walls. These details can help distinguish products, but they do not replace checking whether a tube is appropriate for a particular procedure or handling condition.
Frequently Asked Questions
What does a rimmed test tube mean?
A rimmed test tube has a formed edge around its opening. Some listings call this a beaded rim and describe it as fire-polished.
Which option has the largest stated capacity?
The Pyrex 25 x 150 mm tubes list a 55 mL capacity. The EISCO 50 mL tubes are the next-largest stated options in this selection.
Which product comes in the largest pack?
The EISCO 15 mL model comes in a 48-pack. It has less capacity per tube than the 50–55 mL options.
Are all five selections glass?
Yes. The selected products are described as borosilicate glass. Plastic propagation tubes from the product list are excluded.