Kingmax C507 Digital full metal geared micro servo:

Gear：Full metal
Spline：Exclusive
Motor：Coreless motor
Bearing：2BB
Dead band：2μs default
Waterproof：No
Operating Voltage：DC3.5~8.4V
Rated working voltage：DC 7.4V
Working frequence：1520μs/330hz
Working angle：±63°@800us-2200us
Working temperature：-10℃~+50℃
Storage temperature：-20℃~+60℃

Features:

High performance, digital multivoltage micro wing servo

High-precision metal gears

Full CNC aluminium hulls and structure

High quality coreless motor

8mm ultra-thin thickness

Dual ball bearing

Specifications

Operating Speed(3.5V):0.15sec/60degrees

Operating Speed(5.0V):0.10sec/60degrees

Operating Speed(6.0V):0.08sec/60degrees

Operating Speed(7.4V):0.07sec/60degrees   

Operating Speed(8.4V):0.06sec/60degrees

Stall torque(7.4V):4.9kg.cm(68.06oz/in)

Rated working torque(3.5V):0.9kg.cm(12.50oz/in)

Rated working torque(5.0V):1.8kg.cm(25.00oz/in)

Rated working torque(6.0V):2.0kg.cm(27.78oz/in)

Rated working torque(7.4V):2.3kg.cm(31.94oz/in)

Rated working torque(8.4V):2.5kg.cm(34.72oz/in)

Dimensions:23.5*8*20mm /0.91X0.31X0.78in

Weight:9g(0.31oz)

Connector Wire Length:JR180mm(7.02in)