Jan 1, 2020 My Revolution Wheel set came with the Jumbo flyer & one Bobbin. I knew I would need more so I added 2 more to my Cart!! They are Truly Jumbo, but as smooth spinning as can be. I am enjoying Art Yarn spinning! The wind on of the Yarn seems effortless in the Irish Tension Set-up that is used with the Jumbo Flyer. Beautiful wood Bobbin crafted by a skilled craftsman. They are able to hold anywhere from 12-20oz of handspun yarn depending on yarn style you are spinning or plying! I cannot wait to Fill the 3 I currently own so that I can tell my husband I need a couple more!! Absolutely Love Paradise Fibers WoodShop they don’t skimp on anything & the customer service is wonderful!!