E-flite Park 400 Brushless Outrunner Motor 920Kv Slotted 12-pole outrunner design Prop Adapter (EFLM1923) and gold-plated connectors included Excellent motor for small 3D and scale park flyers 10 oz - 20 oz (280 g - 560 g) Motor Mount included Replacement for Speed 370 and Speed 400 applications Quiet operation\Low noise compared to gearbox systems