Stirring Bar Shape Octagon Material PTFE Product Type Stirring Bar Diameter - Metric 21 mm Overall Length - Metric 50 mm Overall Width - Metric Not Applicable Autoclavable Yes Color Green Standards FDA Compliant ISO 9001 2015 SGS Certification Coating PTFE Features Provides Excellent Surface Area and Generates Strong Turbulence So Liquids are Thoroughly Mixed For Use With Vessels