ITEM NAME:Plain PTFE Magnetic Stirrer Mixer Stir Bar Science Lab Supplies 3x9mm img *{margin:0;padding:0;.These stir bars are magnetic, and coated in PTFE, no harm to human body, and heat resistant to 250 celsius degree. The PTFE coatings are intended to be chemically inert, not contaminating or reacting with the reaction mixture they are in.
