Stirring Bar Shape Spinfin Material Alnico Product Type Stirring Bar Diameter - Metric 19.1 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 Fins on Top and Bottom Ensure Complete Agitation Maintains its Position as a Vessel and will not Wobble For Use With Cylinders Flasks Round Bottom Vessels Test Tubes