2 mm, Overall Length - Metric 12.Stirring Bar, Shape Octagon, Material Alnico, Product Type Stirring Bar, Diameter - Metric 3.7 mm, Overall Width - Metric Not Applicable, Autoclavable Yes, Color Blue, Standards FDA Compliant, ISO 9001:2015, SGS Certification, Coating PTFE, Features Pivot Ring Aids in Reducing Friction and Chattering.