Specifications

Rolled-Rim Test Tube · Specifications

The following are standard size options. Custom sizes are available upon request.

Size (OD×Length mm)	Approx. Wall Thickness (mm)	Packaging (pcs/case)	Material	Typical Application
10×75	0.8–1.0	2000	Borosilicate 3.3	Micro-scale
10×100	0.8–1.0	2000	Borosilicate 3.3	Micro-scale
12×75	0.9–1.1	2000	Borosilicate 3.3	General
12×100	0.9–1.1	2000	Borosilicate 3.3	General
13×100	1.0–1.2	2000	Borosilicate 3.3	General
13×130	1.0–1.2	2000	Borosilicate 3.3	General
15×100	1.0–1.2	1000	Borosilicate 3.3	General
15×150	1.0–1.2	1000	Borosilicate 3.3	General
16×125	1.0–1.2	1000	Borosilicate 3.3	General (most common)
16×150	1.0–1.2	1000	Borosilicate 3.3	General
16×160	1.0–1.2	1000	Borosilicate 3.3	General
18×150	1.1–1.3	600	Borosilicate 3.3	General
18×180	1.1–1.3	600	Borosilicate 3.3	General
20×150	1.2–1.4	400	Borosilicate 3.3	Larger volume
20×200	1.2–1.4	400	Borosilicate 3.3	Larger volume
21×150	1.2–1.4	400	Borosilicate 3.3	Larger volume
21×180	1.2–1.4	400	Borosilicate 3.3	Larger volume
21×200	1.2–1.4	400	Borosilicate 3.3	Larger volume
25×150	1.3–1.5	300	Borosilicate 3.3	Large volume
25×180	1.3–1.5	300	Borosilicate 3.3	Large volume
25×200	1.3–1.5	200	Borosilicate 3.3	Large volume
30×200	1.5–1.8	200	Borosilicate 3.3	Large volume
41×225	1.8–2.0	200	Borosilicate 3.3	Extra large volume

* Dimensions are nominal values. Actual dimensions may vary slightly.
* Custom sizes and special specifications available upon request. Bulk pricing available.
* Rolled rim — compatible with rubber stoppers, cotton plugs, and silicone closures.

Size Selection Guide: Micro-scale (< 5mL) → 10×75mm ~ 13×100mm; General (5–15mL) → 15×150mm ~ 18×180mm (16×125mm is the most common); Larger volume (15–30mL) → 20×200mm ~ 25×200mm; Extra large (> 30mL) → 30×200mm ~ 41×225mm.
For applications requiring frequent stopper use, rolled-rim tubes are strongly recommended for superior rim durability and easier stopper handling.

Product Description

Rolled-rim test tubes are a premium upgrade to standard plain test tubes, featuring a reinforced rim formed through a precision hot-rolling process. Manufactured from high-quality borosilicate glass 3.3, the rolled rim significantly enhances mechanical strength at the tube opening — effectively preventing chipping, cracking, and edge damage while providing a smooth, rounded surface that facilitates easy stopper insertion and removal. As the strength-enhanced version of plain test tubes, rolled-rim tubes are ideal for applications requiring frequent stopper use or where rim durability is a priority.

Key Features

Borosilicate Glass 3.3: ISO 3585 compliant · Low thermal expansion · Thermal shock resistance up to 280°C · Resistant to acids and alkalis
Rolled Rim: Precision hot-rolled rim provides superior strength and a smooth, chip-resistant edge
Enhanced Durability: Rolled design distributes stress — significantly reduces rim chipping and cracking
Uniform Wall Thickness: Even heat distribution — reduces thermal stress and breakage risk
High Clarity: High-purity glass enables clear observation of samples and color changes
Autoclavable: 121°C / 15 psi / 20 minutes steam sterilization
Comprehensive Range: Over 20 sizes from 10×75mm to 41×225mm

Rolled-Rim vs Plain-Rim: Rolled-rim tubes feature a reinforced rim that provides significantly greater mechanical strength than plain-rim tubes, with superior chip resistance. The smooth, rounded rim also enables smoother stopper insertion and removal, making them ideal for applications requiring frequent stopper use or higher rim durability.

Quality Assurance

Each rolled-rim test tube undergoes rigorous dimensional inspection, wall thickness uniformity testing, and visual inspection. The rolling process is precisely controlled to ensure a smooth, uniform rim without burrs or defects. Our products meet laboratory glassware quality standards.

Note: Rolled-rim test tubes are basic tubes — no graduations, no stopper. For graduated functions, choose Graduated Test Tubes; for sealed storage, choose Stoppered Test Tubes; for a combination of features, select the appropriate product based on your needs.

Applications

Typical Application Areas

Education

Chemistry and biology laboratory courses requiring frequent stopper use

Routine Chemical Analysis

Reagent preparation, sample dissolution, heating reactions

Microbiology

Culture preparation, aseptic techniques with cotton plugs

Pharmaceutical QC

Sample vessels in daily testing, sealed solution preparation

Environmental & Food Testing

Water sample and food extract storage and processing

Research

Any application requiring repeated stopper insertion and removal

Rolled-Rim vs Plain-Rim Comparison

Rim Strength Rolled-rim tubes offer superior chip resistance vs plain-rim tubes
Stopper Handling Rolled-rim tubes provide smoother stopper insertion with reduced rim damage
Service Life Rolled-rim tubes have significantly longer service life with less rim chipping
Cost Rolled-rim tubes require additional processing — slightly higher cost
Selection Choose plain-rim for general use; choose rolled-rim for frequent stopper use or where rim durability is critical

Tip: Rolled-rim test tubes are the strength-enhanced version of plain test tubes — ideal for applications requiring frequent stopper insertion and removal or where rim durability is a priority. For general laboratory use, plain-rim tubes are sufficient.