Description: 4x A2212 1000Kv Brushless Outrunner Motor For Airplane Aircraft Quadcopter Mode: A2212 KV: 1000 Max Efficiency: 80% Max Efficiency Current: 4-10A (!#!gt!*!75%) Current Capacity: 12A/60s No Load Current @ 10V: 0.5A No. Of Cells: 2-3 Li-Poly Motor Dimensions: 27.5 x 27mm Shaft Diameter: 3.17mm Dimensions: 8.66 in x 4.72 in x 1.38 in (22.0 cm x 12.0 cm x 3.5 cm) Weight: 8.47 oz (240 g)