powerday XXD A2212 1000KV Brushless Motor for X525 X450 Quadcopter Multirotor Hexacopter 4pcs Max Efficiency Current: 4-10A (&gt;75%) Max Efficiency: 80% Current Capacity: 12A/60s No Load Current @ 10V: 0.5A No. Of Cells: 2-3 Li-Poly Motor Dimensions: 27.5 x 30mm Shaft Diameter: 3.17mm