Can these be autoclaved?

I would have to assume so. They’re scientific instruments. Generally, with a few exceptions, there designed to be regularly sterilized. I regularly send mine through a pressure cooker at 15 PSI in liquid cultures

Could these be used with a sensor for an alarm system (Simplisafe)? I have double hung windows so need a slim magnet to put opposite the sensor. Thx

Probably, but I suspect it would be much easier to use one of these that's the size you want: https://www.amazon.com/s?k=neodymium+disc+magnets&crid=3RBE9SKKGYW9W&sprefix=Neodyn%2Caps%2C235&ref=nb_sb_ss_ts-doa-p_5_6

is there any possibilities that these could degrade and leak into the water? any easy way to see it? thanks

There is nothing to leak. Inside is a solid magnet. It's possible that after using them a long time, friction could wear out the plastic coating, but that will probably take years and you'll see it slowly degrading. Just take a quick glance before you use them and if they look like they are in good condition, they are.

Weewooday 8 Piece 30 Mm 1 18 Inch Ptfe Magnetic

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

🧪 Stir Smarter, Not Harder — Elevate Your Lab Game!

VALUE PACKED SET - 8 identical 30 mm bars in one package to keep your experiments running without interruption.
SLEEK SMOOTH ROTATION - Cylindrical, burr-free design reduces friction for whisper-quiet, consistent stirring.
HEAT DEFYING DURABILITY - PTFE material resists high temperatures, corrosion, and abrasion for reliable lab performance.
VERSATILE LAB ESSENTIAL - Compatible with all magnetic and heating stirrers—perfect for research, academia, and industry.
MAGNETIC PRECISION POWER - Quality magnetic steel core ensures stable rotation with zero deviation, maximizing mixing efficiency.

The Weewooday 8-piece PTFE magnetic stirrer set features 30 mm cylindrical bars crafted from heat-resistant polytetrafluoroethylene and premium magnetic steel. Designed for smooth, stable rotation with no speed deviation, these stir bars excel in scientific, industrial, and academic labs. Compatible with all magnetic and heating stirrers, this set delivers reliable, corrosion-resistant mixing power in a convenient multi-pack.

Specifications

ASIN	B08L3KXRCB
Brand	Weewooday
Brand Name	Weewooday
Color	white
Colour	white
Customer Reviews	4.7 out of 5 stars 754 Reviews
Item Dimensions L x W x Thickness	30L x 30W x 30Th millimeters
Item Thickness	30 Millimeters
Item thickness	30 Millimeters
Manufacturer	Weewooday
Material	Polytetrafluoroethylene and steel
Material Type	Polytetrafluoroethylene and steel
Model Number	Weewooday-PTFE Magnetic Stirrer-01
Number of Pieces	8
Part Number	Weewooday-PTFE Magnetic Stirrer-01
Product dimensions	30L x 30W x 30Th millimeters
Shape	Cylindrical
Unit Count	8 Count

Reviews

A**N

Nice product

Good product, prompt delivery!

4.10.2023

K**D

المغناطيس ضعيف

حجم المغناطيس اكبر بقليل من الحجم العادي و مع هذا نسبة المغناطيسيه به ضعيفة ولم يكن عملي حيث لايدور بشكل المطلوب في الاناء ويقوم برقص بجنون

19.05.2023

X**A

Perfect

These little stir bars work perfectly, they spin quietly, stay centered, and the PTFE coating feels durable. The different sizes make it easy to match whatever beaker or container you’re using. Great value for a reliable set.

7.06.2026

G**N

Works great

No problem

31.01.2025

T**Z

DECENT VALUE

Does the job for magnetic stirring at a decent price. Handles autoclaving temp 250C no prob.

30.10.2024

A**E

So far, So good

Works well. I'm not experiencing problems like some other users. No splitting, or uneven spinning.

30.04.2026

M**T

Reasonabley Priced, Exactly as Advertised

Exactly as advertised.

3.06.2026

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