Fil-Tec's Magna-Glide, prewound bobbins are a high quality, 60wt polyester yarn. The patented magnetic core prevents backlash creating consistent stitches and eliminating the need for a backlash spring. (If your bobbin case has a backlash spring, remove spring before inserting this bobbin.) This trouble free bobbin reduces lint and residual build up in the bobbin case. For best results, it's recommended that you use these bobbins in tandem with Glide thread on the spool. Always insert bobbin magnet side down into the metal case. Each bobbin contains 210 yards of thread. Black and white come in 230 yards. Made in the USA.

Guaranteed to fit Babylock Sewing Machine Models:
Crown Jewel, Tiara

Guaranteed to fit Brother Sewing Machine Models:
B1 Box Machine, B745, B747, B791, B792, B797, B798, PR600, PR600II

Guaranteed to fit Consew Sewing Machine Models:
120, 145R, 146RB, 175RB, 199RB, 205RB, 206RB

Guaranteed to fit Hinterberg Sewing Machine Models:
Indigo19

Guaranteed to fit Juki Sewing Machine Models:
DDL-201, DDL-201H, DDL-201S, DDL-560, DMU-1541, DNU-1541, DNU-241, LZH-1290, POC1600, TL 2200QVP

Guaranteed to fit Mitsubishi Sewing Machine Models:
CU-865-22, DB-130E22, DB-189-22, DB-199-22, DX-370-20, DX-870, DY-330, DY-337, DY-339, DY-340, DY-349, DY-350, DY-359-22, LT2-180BIT, PB-330, PLK-1210, PLK-1410, PLK-1710, PLK-2520, PV-1000, YU-360-22

Guaranteed to fit Pfaff Sewing Machine Models:
18x8 Longarm

Guaranteed to fit Q'nique Sewing Machine Models:
14+, 15R, 19, 21, 21 Pro

Guaranteed to fit Singer Sewing Machine Models:
121C, 121D, 369W, 531B

Guaranteed to fit Viking Sewing Machine Models:
MegaQuilter, Platinum 3000