Hitec RCD USA 55839 Red Transmitter Stick Ends Applicable to DJI series, Futaba, FrSky X9D, Hitec and new Spektrum remote controls. Thread specification: 3mm CNC Alloy Controller Rocker Thumb Stick Set Compatible with DJI Phantom 3 & Inspire 1 Remote Control Package List: 2 x Thumb Controller Rockers, 2 x pillars