HS-625MG SPECIFICATIONS
Speed: 0.18sec/60° at 4.8V
0.15sec/60° at 6.0V
Torque: 5.5 kg-cm (76.37 oz-in) at 4.8V
6.8 kg-cm (94.43 oz-in) at 6.0V
Length: 40.6mm (1.59")
Width: 19.8mm (0.77")
Height: 37.8mm (1.48")
Weight: 60g (2.11oz)

HS-645MG SPECIFICATIONS
Speed: 0.24 sec/60° at 4.8V
0.20 sec/60° at 6.0V
Torque: 106.93 oz-in at 4.8V (7.7 kg-cm)
133.31 oz-in at 6.0V (9.6 kg-cm)
Length: 1.59" (40.6mm)
Width: 0.77" (19.8mm)
Height: 1.48" (37.8mm)
Weight: 2.11oz (60g)