1. Rated voltage: DC12-24V is universal. 110V/220V household appliances cannot be used directly.2. Shaft diameter: 5mm3. Front shaft length: 16mm4. Rated current: 5-20A5. Installation hole diameter: 29mm (M4 threaded hole)6. Motor shaft type: round shaft7. Ball bearings: front and rear double ballsSpecification: Package Weight One Package Weight 0.23kgs / 0.52lb One Package Size 10cm * 8cm * 7cm / 3.94inch * 3.15inch * 2.76inch Qty per Carton 60 Carton Weight 13.70kgs / 30.20lb Carton Size 32cm * 34cm * 37cm / 12.6inch * 13.39inch * 14.57inch Loading Container 20GP: 662 cartons * 60 pcs = 39720 pcs 40HQ: 1537 cartons * 60 pcs = 92220 pcs