POWER GEAR 2,5 Graupner 3339 Toothed belt gearbox with 2.5:1 ratio for ULTRA 800 to ULTRA 1000 high-performance motors or similar types with max. 38 mm case diameter and 5 mm shaft diameter. The gearbox is twin ballraced, and is fitted with a steel wire reinforced toothed belt and a hardened 5 mm diameter steel shaft.
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