Specification :

VWR® Spinbar® Stir Bars, Octagon, Assortment
Cat. No 58948-003
Supplier: VWR International
Assortment of 16 Teflon® resin-coated, octagon-shaped magnetic stir bars with pivot ring. Chemical and temperature resistance up to 260° C ( 500° F) . Autoclavable. Stir bars come in a hinged-top, plastic Spinbox™ . Includes two each of the 7x2mm ( 1/ 4x1/ 14" ) and 10x3mm ( 1/ 3x1/ 9" ) flea-sized micro stirring bars; and two each of the larger stir bars:
12.7 x 7.9 mm ( 1/ 2 x 5/ 16" )
15.9 x 7.9 mm ( 5/ 8 x 5/ 16" )
25.4 x 9.5 mm ( 1 x 3/ 8" )
38.1 x 9.5 mm ( 11/ 2 x 3/ 8" )
50.8 x 9.5 mm ( 2 x 3/ 8" )
63.5 x 9.5 mm ( 21/ 2 x 3/ 8" )