Spec of 3.5T and 5.5T:
- Number of revolutions : 3.5T ca.65,000U/min  5.5T ca.58,000U/min
- Coil : 3.5/5.5 Turns
- Max Power at 7.2V : 600W/ 430W
- Length : 72mm
- Housing length without wave : 52.5mm
- Housing diameter : 35.8mm
- weight : 180g
Source : rcworld.ch