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Brushless Motor 2pcs Micro 8.5mm*20mm Coreless Motor 3.7V 56000RPM / 7.4V 52000 High Speed DIY Drone Quadcopter Mini Working Engine (Speed(RPM) : 2pcs 7.4V Motor) : Amazon.co.uk: Toys & Games
1104 14mm Micro Brushless Motor 4300kv for 1S-3S RC Drone FPV Racing Quadcopter | eBay