Center lower plate: 1-4pcs 45 * 45mm flight control board (FF kk rabbit pirate MWC etc.). With Extend board the ESC parallel plates or 4-in-1 ESC can be installed on it. With mounting holes for Wireless Transmitter CCDOSDGPS antenna special design for installing NAZA flight control (long hole left for VELCRO to fix the controller) holes for tall landing skid. 2200mAh battery can be fixed at the end of the lower plate. Center upper plate: with cross holes for mounting NAZA GPS and aluminum mounting plate (38 * 38/33 * 33) in front of it for FPV camera. Transmitter or remote control receiver and other components can be set at the end of the plate. Biggest propeller can be used: 12-inch usually we use 10.11 inch ones. Recommended motor: 2212.2216.4006.5005. Specification: Wheelbase:500mm Min Arm distance:380mm Max Arm distance:480mm Material: Glass fiber+ ABS Plastic Color: Black Note: Kit only not assembled. This set doesn't include any other electronic accessories.