This listing is for a brand new pack of 20 Bobbins for Singer 107G / 107W Class Sewing Machines and Many Others. The bobbin #210530. Bobbin diameter measures 1" (25mm) and about 9/32" (7mm) thick. These high quality bobbins will fit industrial sewing machines including : Adler : 91, 98 Consew : 275, 276, 347 Singer : 107G, 107W1, 107W3, 107W5, 107W13, 107W14, 107W15, 107W17, 107W18, 107W19, 107W50, 107W52, 107W100, 107W101, 107W102, 107W103, 140W1, 140W2, 143W1, 143W2, 143W3, 143W18, 151K, 151W, 307G2, 457G