NLA Gilson Unitrol Snowblower 21t Auger Worm Gear Set 10398 Toro 700421 ObsoleteThis is a nice set of used auger gears from a vintage 8HP Gilson snowblower. They are heavy duty, old school parts in great low-wear condition. Gear is 3″ OD, 1″ ID, 7/8 thick with 21 teeth and single keyway. Please ask.