30 mm/ 1.18 Inch PTFE Magnetic Stirrer Mixer Stir Bar, White Color, Stir Plate Magnet (4 Pack)

Can these be autoclaved?

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

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

Is there a "flat" side of the magnet, or are both sides curved?