Diameter: 1.1inch (28mm) Case length: 0.87inch (22gm) Weight: 0.8ounce (24gm) Shaft diameter: 3.2mm (0.125inch) KV 1380 (rpms per volt) Continuous current: 7 Amp Maximum burst current: 9 Amp (15 seconds maximum) Controller: ESC 9 to12 Amp Brushless required Prop: 6x5 to 8x3.8 (3cells) or 10X3.8 (2-cells) slow flyer Cells: 6-10 Ni-MH/Ni-CD or 2-3s Li-Po