Manfrotto 131DDB Cross Arm, Double End with Double Head Support, BlackManfrotto 131DDB Cross Arm, Double End with Double Head Support, Black Can be mounted on Supports with max load capacity greater than 6kg and 60mm disc diameter. Key Features Allow positioning of 2 heads on a 90 perpendicular angle Mounts on any column with 3 8'' thread and 60mm disc 3 8'' female thread attachment 2 positional head mounts on the side arm for mounting of 4 heads