Adaptor: 2x 6.35 mm audio sockets

Most common use to connect STILO rally amplifiers - TROPHY or TROPHY-2 to helmet with male audio connector (see HERE) or radio communication systems for Circuit, Rallycross, Autocross (with 6.35 mm audio jack).
Shaft diameter: 6.35 mm

WARNING: This item is not compatible with Nexus type sockets/connectors (7.1 mm). See picture HERE.