F450 450 Quadcopter MultiCopter Frame kit APM 2.8 w/ Shock Absorber 7M GPS Power Module 2212 Motor 30A Simonk ESC Ships From:Russian Federation and the electrical conductivity is

and the electrical conductivity is good

please try to plug them in reverse

Use powerful & high performance MCU

you should contact the customer and increase the freight

F450 450 Quadcopter MultiCopter Frame kit APM 2.8 w/ Shock Absorber 7M GPS Power Module 2212 Motor 30A Simonk ESC Ships From:Russian Federation and the electrical conductivity isF450 frame description Features: Built from quality glass fiber and polyamide nylon. Integrated PCB connections for direct soldering of your ESCs Pre threaded brass sleeves for all of the frame bolts. Colored arms for orientation to keep you flying in the right direction. Large mounting tabs on main frame bottom plate for easy camera mounting. Easy assembly. Specs: Width: 450mm Height: 55mm Weight: 280g (w out electronics) Motor Mount Bolt Holes: 16