Pyrex 1L Narrow Mouth Erlenmeyer Flasks with Heavy Duty Rim
- 1000 ml capacity, 50 ml graduations
- Borosilicate glass, round bottom
- Heavy duty rim, white enamel graduations
- 2 pounds item weight
- Extra large marking space
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A one-liter narrow-mouth Erlenmeyer flask with approximate enamel graduations and a rim designed to resist chipping. It ships in a double-wall corrugated box.
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ASIN: B004XR5VMICategory: Erlenmeyer Flasks
Overview
Pyrex designed this one-liter Erlenmeyer flask with a heavy duty rim to reduce chipping and a uniform wall thickness. Approximate graduations are in durable white enamel, with an extra large marking space.
The reason to buy is the balance of mechanical strength and thermal shock resistance from even wall thickness, in a general-purpose liter size. The limitation is that graduations are approximate and the listing has no heat rating.
Who it's for
School and research benches using a liter flask for mixing and holding solutions. Precise volume work should use volumetric ware, and easy addition of powders favors a wide mouth shape.
Pros and cons
- Chip-resistant heavy rim
- Uniform wall thickness
- White enamel graduations
- Extra large marking space
- Heat rating not listed
- Heavy when full
Performance notes
Wall thickness is uniform, so heat spreads evenly and thermal stress is reduced, while the heavy rim protects the lip. Graduations are for rough volumes only.
Specifications
| Brand | Pyrex |
|---|---|
| Dimensions & fit | |
| Item weight | 2 pounds |
| O.D. X Height(Mm) | 129 x 216 |
| Capacity & performance | |
| Capacity | 1000 ml |
| Construction & materials | |
| Material | Borosilicate Glass |
| Other details | |
| Bottom shape | Round |
| Graduations | 50 ml |
| Part number | FBA_4980-1LCNEa |
| Graduations | 50ml, 250ml to 1000ml |
Frequently asked questions
How should I clean and care for the Pyrex 1 L flask?
The listing gives no care instructions. Wash with a standard lab glassware method and avoid abrupt temperature swings, which the description says the even wall is designed to resist.
How is the flask packaged?
The description says a heavy duty, custom cut, double-wall BC flute corrugated box, with package dimensions of 8.9x5.55x6 inches.
Are the markings exact?
No. The description says the graduations are approximate, in durable white enamel.