For Husqvarna Huskylock 905, 910,936 (S21, S25); Pfaff Coverlock 3.0 & 4.0; Singer QuantumLock 14T948, 14T957, 14T957DC, 14T967DC, 14T968D; Necchi Pro 4050, etc. Fit Pfaff Serger Models Fit Husqvarna Viking Serger Models.
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