JR Propo S8477SS 2K Servo Alloy Case, Metal Gear
Specifications: 
@6.6V 32.2kg-cm    Speed: 0.12 sec/60゜
@7.4V 36.1kg-cm    Speed: 0.11 sec/60゜
@8.4V 41.0kg-cm    Speed: 0.10 sec/60゜
Weight: 62g
Dimensions:  36.5mm x 20.5mm x 40.0 mm