720 Brushed Motor Set 1pcs 7x20mm Coreless Motor with 55mm Propellers An excellently paired combination of high-efficiency propellers and ultra-fast motor, coreless motors provide the speed you need for your next brushed drone build. Specifications: Operating Voltage: 3.7-4.2V Operating Current: 0.08A-0.1A Speed: 45,000RPM Motor Diameter: 7mm Motor Length: 20mm Propeller Shaft Diameter: 1mm Propeller Shaft Length: 5mm Overall Weight: 3g Propeller Length: 55mm Wire Color: Black/White and Red/Blue