Does this beaker require a #7 or #8 stopper?

This beaker came with the stopper that fit, it is a #9 Stopper.

Anyone know the maximum heating temperature?

"The maximum working temperature for PYREX glassware is 490°C. However, once the temperature exceeds 150°C, ensure that heating and cooling is achieved in a slow and uniform manner."

can I pull a vacuum on these flasks? Thanks, AL

They look pretty sturdy, so I'd imagine so ... but I've never tried. However, they are pretty typical Pyrex (meaning, they are very well made).

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Corning Pyrex #4980-1L, 1000ml Narrow Mouth Erlenmeyer Flask with Rubber Stopper (Single)

Product ID: 65903242

Details

Material
Borosilicate
Capacity
1000
Brand
Corning
Bottom Shape
Round
Graduation Interval
50 Milliliters

📏Graduations: 50ml, 250ml, 1000ml

🔍O.D. x Height: 129 x 216 mm

🛡️Heavy Duty Rim

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€ 50.62

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Material
Borosilicate
Capacity
1000
Brand
Corning

Description

🔬 Elevate Your Experiments with Pyrex Precision!

ROBUST DESIGN - Engineered with a heavy-duty rim for durability.
VERSATILE USE - Ideal for labs, classrooms, or home experiments.
SMART PACKAGING - Delivered in a custom cut, double-wall box for safe transport.
PROFESSIONAL QUALITY - Trusted by scientists and educators alike.
PRECISION MEASUREMENTS - Graduated markings for accurate liquid measurement.

The Pyrex #4980-1L is a 1000ml narrow mouth Erlenmeyer flask designed for precision and durability. Featuring graduated markings for easy measurement, a heavy-duty rim for enhanced strength, and packaged in a protective double-wall box, this flask is perfect for both professional and educational settings.

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