What is the measurement of the opening?

17/64 which is just over 1/4 inch.

Can these be autoclaved?

I’m just shooting movies, recommend checking with manufacturer. They are glass though.

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16x100mm Glass Test Tubes with Screw Caps, Black, Borosilicate Glass, Huaou(Pack of 10)

16x100mm Glass Test Tubes with Screw Caps, Black, Borosilicate Glass, Huaou(Pack of 10)

Product ID: 522286978

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🔒Secure screw caps

🔬Borosilicate glass

⚖️Lightweight (169g)

Description

🔬 Science Meets Style: Unleash Your Inner Lab Genius!

📦 VALUE PACK - Includes 10 test tubes, ensuring you have enough for all your creative projects.
🔍 VERSATILE USAGE - Ideal for both professional labs and home experiments—unleash your inner scientist!
🔒 SECURE YOUR SAMPLES - Each tube comes with a reliable black plastic screw cap to keep your contents safe.
⚖️ PERFECTLY PORTABLE - Lightweight design (only 169g) makes it easy to transport your lab essentials.
🔬 ELEVATE YOUR EXPERIMENTS - Crafted from premium 3.3 borosilicate glass for superior durability.

This pack of 10 high-quality 16x100mm glass test tubes is made from durable 3.3 borosilicate glass, featuring secure black plastic screw caps. Perfect for both professional and home laboratory use, these lightweight tubes are designed for versatility and reliability in all your scientific endeavors.

Specifications

Manufacturer	HUAOU
Part number	HO-SG-12*75
Item Weight	169 g
Package Dimensions	12.9 x 7.7 x 7.5 cm; 169 Grams
Item model number	HO-SG-12*75
Size	16x100
Colour	Clear
Material	PLA_(Polylactic_Acid), PC_(Polycarbonate), PE_(Polyethylene), PS_(Polystyrene), Glass Plastic Borosilicate Glass
Number of Pieces	10
Batteries included?	No
Batteries Required?	No

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TrustScore 4.5 | 7,300+ reviews