Features: Highly performances 3115 900KV brushless motor, suitable for 9inch 10inch drones traversing aircraft. To provide strong protections and stable flight. Highly speed 900KV design, with stable power output and efficiency, suitable for 3S-6S batteries. Lightweight design reduces the overall weight of drones, improves maneuverability and flight time. Efficient brushless motor ensures long time reliability. Specifications: Component: Metal Quantity: 1pc, 4pcs(optional) Size: about 37.5x50mm/1.48x1.97inch Model: 3115 KV: 900KV Magnet: N52H Bearing:NMB Support Battery:3S-6S Motor resistance:60mΩ Appearance specification: 18AWG 250mm Motor mount hole distance: 19x19mm Package Includes: 1pc/4pcs Motor(optional) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.