New 16MM fixed sets of imported carbon nanotube reinforced fiber nylon materials for carbon tube diameter 16MM DIY assembly and TAROT 680/690/650 folding frame components using multi-axis aircraft. Up and down the ladder using M2.5 screws fastening [TL2778-01], the diameter of the contact surface makes its M3.2 PCB board and arm securely connected. The new anti-slip design to better locking carbon nanotubes.
