Set of 2 Tension Check Springs For Industrial Single Needle Sewing Machines. These high quality tension spring will fit most industrial straight stitch single needle sewing machines including : ARTISAN : 5550N, 8500N BROTHER : B735, B737 FEIYUE : 8500, 8700 GEMSY : 8700 JUKI : DDL-555, DDL-5550, DDL-5600, DDL-8300, DDL-8500, DDL-8700, DDL-9000 REX : RX8500 SINGER : 96, 103K, 188K, 188U, 196K, 241, 245, 251 SUNSTAR : KM-123A TACSEW : 5550, T8700 YAMATA : FY8500, FY8700 And many more!! You will receive two(2) springs.