Dimension information: Motor diameter: 24.4mm Body length: 12.5mm Shaft diameter:2.0mm Technical Performance: RF-300CA-11400 Voltage range: 0.7-5V Working voltage: 2V No load: Speed: 2400r/min Current: 0.02A On load: Speed:1820 r/min Current: 0.062A Rated load:3.03g.cm At Stall: Torque:12.5g.cm Current: 0.17A RF-300CA-09560 Voltage range: 1.0-6.0V Working voltage:3.5V No load: Speed: 3100 r/min Current: 0.015A On load: Speed: 2250 r/min Current: 0.055A Rated load:4.5g.cm At Stall: Torque:16g.cm Current: 0.175A RF-300CA-1D390 Voltage range: 2.8-7.0V Working voltage: 3.9V No load: Speed: 4400r/min Current: 0.02A On load: Speed:3520 r/min Current: 0.08A Rated load:4.8g.cm At Stall: Torque:24g.cm Current: 0.34A