Magnetic stirring bars, elliptical, rare earth

Pack of 10
15 mm
PTFE covered, rare earth magnetic core. The magnetic core is made from a combination of samarium and cobalt. The stirrers will continue to function at full strength for many years as the magnetism remains for longer. They are identified by an inert carbon black spot.
 
Magnetic attraction is 1,5 to 2 times stronger than conventional stirrers 
Excellent chemical resistance
Temperature resistant, suitable for use at high and low temperatures (−200 to +280 °C)