This is a bobbin for a Woolee winder which is a type of flyer used on a spinning wheel. The bobbin will work on a jumbo Woolee winder flyer and has been designed with 5 separate parts for ease of printing. The wall thickness and top and bottom are adjustable. I use both support and rafts.
Ashford spinning wheels are made in New Zealand and used throughout the world. Woolee winders are specific to particular spinning wheels.