We encourage you to ask us for help if you are not sure which Looper you need. Just Email us at ron@a1sewingmachine.com with your machine make and model and you will get a very fast answer.
Lower looper Singer, Pfaff #550411
Lower Looper, Brother ,Viking Overlock/Serger #127840-001
Upper Looper Brother, Viking X75209-001
Upper Looper, Brother , Viking Overlock/Serger #127814-001