Specification:Model A1.Model: RF-300-1D3902.electronic starter diameter: 24.3mm3.electronic starter height: 12.4mm4.Output shaft diameter: 2.0mm5.Output shaft length: 5mm6.Weight: 22g7.Voltage range: DC 1.5V-6V8.Test data:Voltage:1.5V No-load speed:1800RPM Current:8mAVoltage:3.0V No-load speed:3600RPM Current:12mAVoltage:5.0V No-load speed:6050RPM Current:17mAVoltage:6.0V No-load speed:7250RPM Current:20mA================================================================================Model B1.Model: RF-300CA2.electronic starter diameter: 24.35mm3.electronic starter height: 12.4mm4.Output shaft diameter: 2.0mm5.Output shaft length: 10mm6.Weight: 22g7.Voltage range: DC 1.5V-6V8.Test data:Voltage:3.0V No-load speed:4900RPM Current:27mAVoltage:3.7V No-load speed:6300RPM Current:30mAVoltage:5.0V No-load speed:8500RPM Current:36mAVoltage:6.0V No-load speed:10200RPM Current:42mA