The 864 Elna Easy Air Thread Serger: Amazingly Easy, Thread both upper and lower loopers by pushing the Air Threader Lever. Built-in Needle Threaders, Tedious threading is a thing of the past. :
elna 664 PRO - V1 - Ottawa Sewing Centre
Elna Lock Pro 5 DC serger twin needle demonstration - YouTube
Elna Sewing Machine Ball Point Needles - 90 Sewing Machine Needle spares | Sewing Parts and Accessories