is it heat proof - cant believe it doesnt say this ?

Yes this is heat proof, i have used them on a gas hob to boil liquids

are they heat resistant? would they work over a bunsen burner?

These are heat resistant and can be used with a bunsen burner. Proper safety equipment is recommended especially when heating a glass beaker for the first time.

Are the markings etched on ?. Or just printed on. As it is not stated probably not as not a selling point. I have yet to see markings that do not come off over time.

This item is printed using ACL or Applied Ceramic Labeling. The ink is essentially porcelain stone that is baked on at very high temperature for several hours. This stone is melted into the surface of the glass. It is very resistant to removal and even if scraped intentionally with a blade it cannot be removed. Extended repeated use may dull the top surface but ACL printing is considered a permanent method of printing.

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Karter Scientific, 3.3 Boro, Griffin Low Form, Glass Beaker Set - 5 Sizes - 50ml, 100ml, 250ml, 500ml, 1000ml

Product ID: 60504926

Details

Bottom shape
Round
Brand
Karter
Capacity
1000 ml
Global Trade Identification Number
Manufacturer
Karter
Material
Borosilicate

📏Double-metric scale - Precision with ±5% tolerance

🔥3.3 Borosilicate Glass - Ultimate heat & chemical resistance

🧪5 Sizes (50-1000ml) - Versatile lab & kitchen use

S/.247

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Description

🧪 Elevate your experiments with precision and style — don’t get left behind!

SPACE SMART NESTING - Designed to nest seamlessly, saving precious bench or storage space in your lab or kitchen.
LAB GRADE DURABILITY - Crafted from Type 1 Class A 3.3 Borosilicate Glass for unmatched thermal shock and chemical resistance.
VERSATILE SIZE RANGE - Includes 5 essential sizes from 50ml to 1000ml, perfect for everything from micro experiments to bulk mixing.
PRECISION MEASUREMENT - Double-metric scale graduations ensure accurate readings with a tight ±5% tolerance—no guesswork, just results.
TRUSTED PROFESSIONAL STANDARD - Meets ASTM E960 Type I specifications, the gold standard for scientific glassware—join thousands of pros who rely on Karter.

The Karter Scientific 3.3 Boro Griffin Low Form Glass Beaker Set includes five sizes (50ml to 1000ml) made from premium Type 1 Class A borosilicate glass. Engineered to meet ASTM E960 Type I standards, these beakers offer exceptional heat, acid, and alkali resistance with precise double-metric graduations. Their flat-bottom design ensures stability on any surface, while nesting capability optimizes storage. Ideal for professional labs and discerning home users seeking durable, accurate, and versatile glassware.

Specifications

ASIN	B006UKICJA
Best Sellers Rank	50,943 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 58 in Lab Beakers
Bottom Shape	Round
Brand	Karter Scientific
Capacity	1000 ml
Country Of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (5,478)
Global Trade Identification Number	00609408204197
Item Shape	Cylindrical with flat bottom
Item Weight	363 g
Manufacturer	Karter Scientific
Manufacturer Part Number	213A2
Material Type	Borosilicate Glass
Model Number	213A2
Number of Items	6
Specification Met	ASTM E960, Astm
UPC	609408204197 817556010977 789164173583
Unit Count	5 Beakers

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S/.247

Duties & taxes included

In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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