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.

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4 Pieces PTFE Magnetic Stir Bar Lab Stirrer,30 Mm/ 1.18 Inch

4 Pieces PTFE Magnetic Stir Bar Lab Stirrer,30 Mm/ 1.18 Inch

Product ID: 262547000

Details

Brand
Weewooday
Color
white
Material
Product Dimensions
0.31"W x
Shape
Cylindrical

🧲30mm precision magnetic core

⚙️Smooth rotation, no speed deviation

🛡️PTFE resists corrosion & abrasion

€ 17.57

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Description

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

READY TO USE 4 PACK - Four perfectly sized 30mm stir bars included—always have a backup for uninterrupted experiments.
UNMATCHED DURABILITY - Engineered with premium PTFE and magnetic steel to withstand harsh lab conditions without wear.
VERSATILE LAB ESSENTIAL - Compatible with all standard magnetic and heating stirrers—perfect for research, industrial, and academic labs.
PRECISION MIXING EVERY TIME - Cylindrical, burr-free design ensures ultra-smooth rotation and consistent stirring speed.
CORROSION ABRASION RESISTANT - Built to resist chemical corrosion and mechanical abrasion, extending your stir bar’s lifespan.

The Weewooday 4 Pieces PTFE Magnetic Stir Bars are precision-engineered 30mm cylindrical bars made from durable PTFE and magnetic steel. Designed for smooth, stable rotation without speed deviation, they resist corrosion and abrasion, making them ideal for scientific research, industrial, and academic laboratories. Compatible with all standard magnetic and heating stirrers, this 4-pack ensures reliable, long-lasting performance for your mixing needs.

Specifications

ASIN	B08P3JKLSJ
Best Sellers Rank	#5,307 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Lab Stirrers, Mixers & Accessories
Brand Name	Weewooday
Color	white
Customer Reviews	4.7 4.7 out of 5 stars (1,703)
Item Dimensions L x W x Thickness	0.31"W x 0.31"Th
Item Thickness	0.31 inches
Manufacturer	Weewooday
Material Type	Polytetrafluoroethylene
Model Number	Weewooday-PTFE Magnetic Stirrer-01
Number of Items	4
Number of Pieces	4
Part Number	Weewooday-PTFE Magnetic Stirrer-01
Shape	Cylindrical
Unit Count	4 Count

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€ 17.57

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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