This is our new low cost, but extremely DC Gear Motor. Specification:No-load Speed: 29RPM at 12 Volts;kg.cm: 0.51No-load Current: 0.05A;Load Current: 0.11A;D Shaft Size: 8mm x 3mm/0.31 x 0.12 inches (L*D);Gearbox Size: 18mm x 20mm/ 0.71 x 0.79 inches (L*D);Motor Size: 22.5mm x 17mm/0.89 x 0.67inches (L*D);