S401
Size: 22(L) X 12(W) X 29(H) mm
Toque: 1.8 kg-cm @ 4.8V
Speed: 0.11sec/60 degree @ 4.8V
Weight: 9 Grams

DS401M
Size: 22.8(L) X 12.5(W) X 20.5(H) mm
Toque: 2.2 kg-cm @ 4.8V
Speed: 0.13sec/60 degree @ 4.8V
Weight: 18 Grams

S501

DS501M

DS502C
Digital Coreless motor, ideal for 250/450/500 tail servo
Size: 35.5(L) X 15(W) X 28.6(H) mm
Toque: 2 kg-cm @ 4.8V
Speed: 0.08sec/60 degree @ 4.8V
Weight: 26 Grams