Cutex Brand products are sold and distributed exclusively by Cutex Sewing Supplies only, all others are NOT Cutex brand products and quality will not be guaranteed. Please be sure to check for Cutex brand and packaging for authenticity. Pack of 20 metal drop-in bobbins for Singer Class 66 / 99 / 200 / 300 / 400 / 500 / 700 / 800 / series 6100 / 6500 / 7100 and other drop-in bobbin machines. These high quality metal bobbins #172222 have four holes on each side. The bobbin measures 13/16" diameter and 3/8" wide. These top quality metal bobbins will fit following models. SINGER Model Numbers : 1022, 1200-1, 1247, 1263, 1280, 1288, 1802, 1803, 1812, 1852, 1853, 185CL, 1862, 1872, 1873, 192, 201-2, 2210, 2302, 2303, 2304, 2315, 2330, 240, 2404, 241, 242, 2430, 2440, 247, 247AP, 248, 249, 2502, 2503, 2504, 2515, 252, 2530, 257, 258, 259, 263, 285, 288,  WHITE Model Numbers : 8600, 8800 We stock many different types of bobbins & bobbin cases for industrial & home sewing machines. 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. Thank you for looking!!!