UNIVERSAL-Kleingetriebe 2:1 Graupner 1139.20 Motor, gearbox and sterntube are combined to form a compact unit. Individual components are exchangeable in optional manner. Rapport 2:1
For E-motors SPEED 400 and E-motors with case Ø of approx. 28 mm and 2.3 mm shaft Ø
For prop shafts Sterntubes with 6 mm Ø