Manfrotto 131DDB (Cross Arm, Double End with Double Head Support - Black) is the black-anodized version of the 131DD silver cross arm—a 60cm horizontal aluminum bar that mounts to any 3/8"-16 tripod column (60mm disc), featuring two perpendicular platforms with four total 3/8" female threads for simultaneous mounting of up to four tripod heads in studio/copy configurations.
