Upper Looper, Babylock #61294
Guaranteed to fit Babylock Serger Machine Models:
BL402, BL5370, BL5370ED, BL550, ST600L
Guaranteed to fit Riccar Serger Machine Models:
RL739DE, R739DE, RL749L
Guaranteed to fit Simplicity Serger Machine Models:
SL4380BH, SL4380ED, SL4390ED, SL4690L