Permanent Magnet, Neodymium Magnet, Pot Magnet manufacturer / supplier in China, offering 11X52mm Stir Bar Magnet with PTFE Coated, PTFE Coated Retrievers Bar Magnet 250 300 350 400, 6500GS 11X52 Waterproof Stir Bar Magnetic Bar with PTFE Coated and so on.