Ultra Light: 44g(1.55oz), with machined aluminum case and carbon motor plate, grade 5 Titanium output shaft
Ultra Smooth: Hardened chromoly gears, low noise and smooth
Compatibility: Works with straight axles. 5mm output shaft. Motor bolt holes 25mm on center. Skid plate mounting holes 33mm on center (M3 threaded holes). With aluminum slidable shim based on the Axial 3 gear type transmission mounting holes. Fits 48 Pitch pinions from 11T to 18T (Not Included)