Gikfun Assorted APM 2.6 2.52 Flight Control Cable (DF13 4/5/6 Position Connector) Pack of 8pcs AE1032 6P/5P/4P, 20cm 4P*2pcs 5P*4pcs 6P*2pcs This communication cable uses the DF13 series connector. It is 20 cm long and it is designed to be used on the APM and PX4 board series.