Description: 【Material】: Electric Speed Controller is made of ABS material to ensure long term use  【 4 in 1 ESC 】: Featuring  current endurance and durability. These ESC  support DSHOT600 for smooth throttle response and powerful 【Easy to install】:  Brushless ESC is easy to install ,suitable for beginner 【High Performance 】:The ESC has onboard filter capacitors to suppress electromotive force, stabilize the battery voltage, and protect the precision components of the flight control ESC. 【Package】: Including a set of 4 in 1 ESC board Specification:45A ESC Installation size 30.5mm×30.5mm, mounting hole is M4, supports shock column installation. Continuous current: 45A. Momentary current [5 seconds]: 55A. : BLSJH_30_REV16_7. MOS tube model is QN3019M6. The ESC has a filter that suppresses electromotive force, stabilizes the battery voltage, and protects the precision components of the flight control ESC. Size Chart: Hole Space(Distance between screws for fixing installation):3.05cm/1.20inch     Package Includes: 1 Electric Speed Controller Set Note: Please allow slightly errors due to manual measurement and different monitors.