Description: PTFE magnetic stirrer mixer stir bar science lab experiment equipment Stiring bar mixers, coated in white PTFEcorrosion resistance, acid and alkali resistance, high temperature resistance PTFE casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning For stir a liquid or solution in biological, chemical, and research laboratory applications Safe for use in food, and cosmetic applications and pivot ring helps reduce friction, vibration and wear DiaxLength : 6x20mm MaterialPolytetrafluoroethylene Color White Specification: A magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic field to cause a stir bar (or flea) immersed in a liquid to spin very quickly, thus stirring it. The rotating field may be created either by a rotating magnet or a set of stationary electromagnets, placed beneath the vessel with the liquid. Package Includes:(40 Pack) 1 piece PTFE Magnetic Stirrer Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.