It is a stabilizerless head.
SSL washout control arm, D3V2 radius block, pitch rod also comes with a set of heads. It can be installed as a replacement for the Gigas 550E or as a stabilizerless head for SDX. Swashplate for Gigas 550E 0308-024 PH16 multi swash plate 120 ° 135 ° also supports SDX standard equipped 0412-304 SDX swashplate.