Brand: Maytech
Model: MTDS001
9g digital servo specs: (can be perfectly used for 450/400 Class Helicopters)
*Size: 23.0 x 12.0x 21.5mm
*Operating Speed: 0.12sec/60degree
*Stall Torque: 1.5 kg/cm
*Operating Voltage: 4.80-6 Volts

Maytech 9gram servo is a superior performance servo, coming from the same factory as HD Power servos. It may be sold at a budget price but the performance and quality will easily match or exceed any other servo on the market!
Excellent quality servos, equivalent to SG90. Anyone that has used these is amazed by quality! ! Light and very quick servo ideal for weight sensitive applications. Includes several servo horns, grommets and mounting screws.