Corona servos are well known in the RC hobby as to servos. At 6.2 grams of weight, and a holding power of 0.82kg.cm on a single cell lip bettery, these servos are fantastic. Click here for more info on this servo.
Turnigy TGY-0025 Nano Servos
The lightest servo of the group, these are new to the market and offer an exceptional weight to torque ratio. At 2.5 grams of weight and email@example.comV of torque. Click here for more into.