| The Jumbo Flyer kit will fit allow you to spin larger, chunkier yarns of your Kromski spinning wheel. The jumbo bobbin gives approximately twice the space over the standard bobbin, whether spinning or plying. Converts ratio to; 5:1, 7.5: & 10:1 Some people may find these ratios are suitable for everyday spinning as they give low to medium twist yarns and will leave the jumbo flyer on the wheel for all the work. Oriface diameter 18mm |