SS Series 2223 1800KV/2900KV/3500KV RC Brushless Motor Support 3S 4S 6S 50A ESC for 450 Grade RC Helicopter Airplane HG2223PRO-1800KVWeight: 82g Size :27.2*42mm Output Shaft Dia.: 3.45mm T: 8TKV: 1800KVCompatible with 450 graded rc model helicopter airplane No Load Current: 2.3 A Power: 600 W Effiency: 83% Suitable ESC: 50 A Working Voltage: 6S Li Po HG2223PRO-2900KVWeight: 82g Size :27.2*42mm Output Shaft Dia.: 3.45mm T: 6TKV: 2900KVCompatible with 450 graded rc model helicopter airplane No Load Current: 2.7 A Power: 600 W Effiency: 80% Suitable ESC: 50 A Working Voltage: 4S Li Po HG2223PRO-3500KVWeight: 82g Size :27.2*42mm Output Shaft Dia.: 3.45mm T: 5TKV: 3500KVCompatible with 450 graded rc model helicopter airplane No Load Current: 3 A Power: 600 W Effiency: 80% Suitable ESC: 50 A Working Voltage: 3S Li Po Package Included 1 x Motor