Coreless Motor 720 with Propeller 55mm

From the shop's description

DC 3.7V 50000RPM 720 Hollow Cup Coreless High-Speed Motors with Mini Propellers for RC Aircraft Suitable for Mini Quadcopter. Specifications Motor Length: 20mm Motor Diameter: 7mm Propeller Length: 55mm Shaft Diameter: 1mm Shaft length: 5.1mm Red (Positive ), Blue (negative ) Voltage: 1V to 5V Current: 0.03A Speed: 50,000 RPM (at 5V) Silver Color.