Pack of 10 Large Capacity Metal Bobbins for Juki Industrial Sewing Machines. Bobbin size : 1" diameter X 3/8" thick (25.5mm X 10mm) For Juki Industrial Sewing Machines : DNU-1541, DNU-1541S, DNU-1541H, DNU-241, DNU-261, DSU-144N, DU-141, DU-1181, DU-580, LS-341, LS-1340, LS-1341, LS-1342 And more! Bobbin color may vary. We stock many different types of sewing machine bobbins. Even if you don't find the one you looking for, it does not mean we don't have it in stock. Please let us know machine builders' reference numbers and/or machine make & model and we will find one for you.