GK-V3-15 inch FPV drone frame assembly carbon fiber frame Model: GK-15 inch V3 carbon fiber Wheelbase: 680mm Weight:700g Top plate thickness: 2.5 millimeters Bottom plate thickness: 2.5 millimeters Arm thickness: 7mm Camera mounting hole spacing: 19mm Measurement and installation hole spacing of 20 * 20mm&30.5 * 30.5mm Flight controller installation spacing: 30.5 * 30.5 millimeters Internal space height: 40mm Motor installation hole spacing: 25 * 25mm&30 * 30mm