This WooLee Winder will fit the Majacraft Aura or any other Majacraft wheel (using the included spacer).  It has the fine fiber orifice and uses the whorls from Majacraft so the ratios remain the same as with your stock flyer.  The  WooLee Winder consists of the flyer and one bobbin.

Please Note:  The bobbin ends for the Woolee Winder are made of maple hardwood and are therefore NOT boilable.   They have the same relative capacity as the Majacraft bobbins and will fit on the Majacraft lazy kate.