The large Rose whorl is finished in clear lacquer and produces ratios of 4.2-15.6:1 with a Rose wheel. This whorl is also available as part of a Slow Speed Kit for the Suzie wheels.
The Slow whorl gives ratios of:
3.2, 4.25, 5.75, 8.5 and 11.5 to 1 on the Gem
3.25, 4.5, 6, 8.75 and 12 to 1 on the Suzie.