The Xing-E Pro series is an economical variant of the great iFlight Xing engines suitable for both freestyle and racing flying with a very good price / performance ratio. They are durable, powerful and affordable. This motor is characterized by a solid 4mm steel hollow shaft, larger NSK 9x4x4mm bearings and high-quality N52SH curved magnets. The pro version is unibell. We recommend the 2450Kv variant for standard 5 "copters in combination with a 4S battery.