This motor uses a standard 16-piece inner core, a copper wire diameter of 0.15mm, a single-stage turn of 100 turns, and a 45mm long shaft double output. It is a special-application micro-motor. The speed is about 11000 rpm under 3V voltage. Magnetic, low torque, suitable for common applications. Note: The motor is brand new, because it is an iron sheet, so there may be small pits or scratches in some cases! For those who are prone to cleanliness, be careful! Voltage range: 1.5V-6V 3V speed is 11000 rpm Total length with shaft: 45mm Diameter: 20mm Body thickness: 15mm Double output shaft length: 8mm, shaft diameter: 2mm Weight: about 15 grams