5pcs 7*16mm 716 DC Coreless Motor 4.2V 60000rpm High speed Helicopter Model Aircraft Toy Accessories size: 7*16.5 MM Voltage: 3-5 V Voltage: 3.7 V; Current: 0.08 A;Speed: 52000 RPM Output shaft: 0.8 MM The output shaft length: 7 MM