7Pcs A-Type Stir Bar High Temp Corrosion Resistant

Seven-piece pack of A-type magnetic stir bars, each precisely 10 mm long and 4 mm in diameter, made from PTFE-encapsulated stainless steel. Total net weight ~2.1 g. Designed for durability and functional consistency in UK and EU laboratory environments where exposure to heat, moisture, and reactive chemicals is routine. Each stir bar supports stable rotational motion under magnetic drive, facilitating thorough mixing of multi-phase systems and reducing thermal gradients in heated vessels. This leads to shorter equilibration periods and more accurate endpoint detection in titrations, extractions, or digestions. Their inert surface avoids catalytic interference and preserves sample integrity — particularly relevant in trace-element analysis or sensitive biological assays. Resistant to degradation in concentrated mineral acids (HNO₃, H₂SO₄), caustic alkalis (NaOH/KOH), and polar/non-polar organics (acetonitrile, toluene, ether), these bars remain dimensionally stable and magnetically responsive. The three offered styles — straight, oval, and cross — provide mechanical adaptability: straight for standard beakers, oval for round-bottom flasks with curved bases, cross for wide-mouth containers requiring vigorous agitation.