The jumbo bobbins have a large capacity and can be used in conjuction with a plying flyer, Wild Flyer or Aura Hybrid flyer. Like all our wood bobbins they are made using bamboo and fibreglass so will match your other Majacraft bobbins. You can ply up to two standard bobbins of yarn onto the Jumbo bobbin or you can spin longer yarns when using it with a Wild Flyer or Aura Hybrid flyer.