guaranteed to fit babylock serger models: bl3200, bl5180, bl5180ns, bl3-418, bl3-426, bl4-428, bl4-436, bl4-436df, bl4-625, bl4-714, bl5280, bl5280ensguaranteed to fit riccar sewing machine models: rl613, rl613eguaranteed to fit simplicity serger models: sl660, sl850, sl880, sl880dguaranteed to fit singer serger (overlock) models: 14u244, 14u34b, 14u44, 14u64a, 14u234b, 14u286bguaranteed to fit white serger models: 1500 speedylock, 1600 speedylockalternate part numbers: 141000356, 419088
