Bel-Art Spinpak Teflon Octagon Magnetic Stirring Bar Assortment with Restrainer (Pack of 10) A 10-pack of the most commonly used Spinbar® Octagonal Magnetic Stirring Bars in a variety of colors and sizes. • Eight-sided Spinbar® Octagonal Magnetic Stirring Bars provide greater surface area and added turbulence when compared to smooth cylindrical bars • Alnico magnet encapsulated in FDA Grade, USP Class VI Teflon® brand PTFE Coating – Superior Chemical Compatibility; manufactured in a registered ISO 9001:2015 facility, as verified by SGS certification • Included Spinbar® Restrainer fits comfortably in one hand and retains Spinbar® Magnetic Stirring Bars up to 80mm (3”) long by holding them against vessel walls; eliminates splashing hazards when pouring • Includes Spinbar® sizes: 2 each - ½ x ⅛”, ½ x ⁵/₁₆”, 1 x ⁵/₁₆”, 1½ x ⁵/₁₆”, 2 x ⁵/₁₆” TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.