New, unused PTFE (also referred to as Teflon) material. Since PTFE is hydrophobic, has high corrosion resistance and is very non reactive, it's a the high quality material for magnetic stirring bars. Our laboratory-grade stir bars are octagon shaped, with a pivot ring for decreased resistance. 3 each, 10mm long by 7.5mm wide (approximately 0.393 inches by 0.295 inches). Your order is shipped quickly from the United States. Great for home brewing yeast mixing.
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