Octagon—Octagonal stirring bars are the most commonly used shape. They have a large surface area to generate more turbulence than round bars, so they stir up particles for better mixing.

Polygon—Polygonal stirring bars spin smoothly like round bars, but also generate turbulence for mixing particles, such as salts, into solutions. Select the large ODs for jobs in drums or tanks.

Capsule—Capsule stirring bars are sized just right for small containers, such as vials, tubes, and gradient makers.

Oval—Oval stirring bars work best with round-bottom flasks.

Triangle—Triangular stirring bars are designed to fit small vials. Use the _3/16” wide bars for 1 mL vials and the _3/8” wide bars for 3-5 mL vials.

Cylinder—Cylinder stirring bars spin more smoothly than octagonal bars.