3.7V 100mA 40000RPM 7 x 16mm 2 rotor two side propellers DC Motors Helicopter Propellers Product Name : Helicopter Propeller w Motor;Voltage : DC 3.7V;No-load Speed : 40000RPM No-load Current : 100mA;Plasma Current : 1.6A;Shaft Length : 7mm Shaft Diameter : 0.8mm;Motor Size : 7 x 16mm/0.28" x 0.63"(D*L);Propeller Size : 46 x 9mm/ 1.8" x 0.35"(L*W) Wire Length : 5cm/ 2";Main Color : Silver Tone, Black;Material : Metal, Plastic Weight : 6g;Package Content : 2 x Helicopter Propellers2 x Motors If you have any question , please feel free to contact us. Please do not leave us negative feedback, this item leave us few profits.