Metal Bobbin For Walking Foot & Double Needle Industrial Sewing Machine - Singer #203470 | GoldStar Tool
Amazon.com: Bobbin # 17222 for Singer Class 66 Metal Bobbin (10 Pack) : Arts, Crafts & Sewing
YOKOYAMA 10PCS Metal Bobbins Spool Sewing Craft Tool Bobbin Core Sewing Home Old-Fashioned Foot Sewing Machine Accessories - AliExpress
Amazon.com: CKPSMS Brand - M Size Metal bobbins with Inner Hole Diameter just Short of 1/4inch(6mm) Compatible with/Replacement for CONSEW Brand 205RB,206RB JUKI Brand DNU-241,DNU-1541,DNU-1541S,LS-246 (20PCS)