Cutex (TM) Brand 30 Metal Bobbins For Industrial Single Needle Sewing Machines #40264NS Brand New Set of 30 Top Quality Bobbins for Industrial Single Needle Sewing Machines. These high quality Metal Bobbins #40264NS are White/Silver with holes on one side. The Metric Measurements for these bobbins are 21MM wide and 8.5MM thick.