Stirring Bar Shape Ring Material Alnico Product Type Stirring Bar Diameter - Metric 31.8 mm Overall Length - Metric 25.4 mm Overall Width - Metric Not Applicable Autoclavable Yes Color White Standards FDA Compliant ISO 9001 2015 SGS Certification USP Class VI Coating PTFE Features Friction Fit of the inHoop in and Bar Allows Them to Spin as a Unit Spin Out is Virtually Eliminated Stirring Bar Remains Centered For Use With Beakers Buckets Vessels