DJI Part 33 ESC Center Board and Main Controller for Phantom 3 Professional and Advanced Drones This drone part is for Professional and recreational use. Quadcopter part is tested for safety and durability. Part #33 ESC Center Board & MC (Pro/Adv) CP.PT.000219. Part dimensions: 1.25 x 5.75 x 5.75 inches. Part #33 ESC Center Board & MC is compatible with the Phantom 3 quadcopter drone