Bobbin Case For Industrial Zig-Zag Sewing Machines Bobbin case # 541678NBL Made in Japan This high quality NBL (No-Back-Lash) bobbin case is designed with a brake spring which puts constant, light pressure on bobbin to overcome momentum. Bobbin stops spinning faster, preventing unraveling or tangling of bobbin thread when sewing operations stop and start. Fits following sewing machine models : Alphasew : P20U33-3 Artisan : 20U-143 Brother : XL622, XL702, XL703, XL2005, XL4001, XL5001 Eltac : 750 Series Happy : HCM, HM4, HMF, HMS, J-4, J-7, J-8, K-4, K-7, K-8 Singer : 20U Class Tacsew : T20U73 Typical : GYD20-6 White : 305, 510, 710, 690 And many more.