null Specification: Net weight: 311g Dimensions: Φ44.3 * 55mm Output shaft diameter: 6mm Motor T number: 4 T Motor KV: 1250KVApplicable models: 550-600 level electric helicopter No-load current: 2.8 A Power: ≈2200 W Efficiency: 85% Applicable ESC: 100 A Working voltage: 8S lithium battery Package included: 1 x SS Series 550/600 Class 3730-1250kv Brushless Motor for RC Airplane RC Plane Spare Part