Reddit reviews Bel-Art Spinplus Teflon Magnetic Stirring Bar; 38.1 x 15.8mm, White (F37144-0112)

Cross shape (also called a star shape or a plus shape) creates a vortex to the bottom of the container and provides more stability and less vibration than single-bar shapesTeflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinningSpins on the bottom of the container to disperse sediment and air bubblesInternal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobaltCasing material is approved for use in food, drug, and cosmetic applications