The motor is mounted on an 18V/21V lithium battery garden machinery tool, with a 26mm diameter strong magnetic inner rotor *Made of high-quality materials for maximum durability and reliability. *Professional workmanship, exquisite , novel and style high-power 5030 brushless motor, with a nominal voltage of 21V and a maximum power of approximately 800W. Originally designed for use with 12 inch electric chain saws, the motor is suitable for retrofitting power tools or model drive motors, etc. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need., Weight: 0.98656862245 pounds, Manufacturer: NONDK