These are some professional and practical magnetic stir bars, works perfect, useful with mixing solutions together. Easy to use by the light weight and simple structure. Widely used in scientific research, universities, laboratories in the industrial and agricultural sectors to fit your needs. Features -Color:White.-Material:PTFE, NdFeB.-Size:2.00X0.60X0.60cm,3.00X0.70X0.70cm/0.79X0.24X0.24in,1.18X0.28X0.28in.- No adhesion, high and low temperature resistance, weather resistance, this stir bar can serve you well.- Can resist a variety of organic solvents, and is almost insoluble in solvents, being very professional and practical.- Can be used with corrosive chemicals, also helps reduce friction and wear while stirring.- Stir plate magnet bar will be suitable for different kinds of magnetic stirrers or heating stirrers.- Widely used in scientific research, colleges and universities, industrial and agricultural laboratories, can also be used to stir mixed substances.Packing list: 8 x Magnetic Stir Bars