The motor weights 35g, and has bigger 23mm wide stator than the normal 22mm. It has the same famous ¡°red bottom¡± as previous RS series motors, but comes with a white bell. The white motor bell is a special edition thing, in the future batches it will go back to the normal black color. Prop shaft diameter is 5mm and it is designed for 3S and 4S LiPo batteries.