1.Usage: Used to stir a liquid or solution in biological, chemical, and research laboratory applications. 2:Using way: Placed inside a container of liquid or solution that is seated on a magnetic stirrer, creating a rotating magnetic field using a rotating magnet or multiple stationary electromagnets. 3:High quality material:PTFE casing is chemically inert, be used with harsh chemicals and reduces friction while in spinning. 4:Perfect design:Built-in pivot ring helps reduce vibration and wear during stirring, individual shapes create different vortexes for efficient and effective stirring. 5:Different size set:Different size can appear all our needs. Specification: Colour:White Material:PTEE Package Contents: 10 x rod magnetic mixer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.