BRCOVAN2 Pack, 1'' Ball Adapter with M10 x 1.25 Threaded Post Compatible with RAM Mounts B Size Double Socket Arm

BRCOVAN 2 Pack, 1'' Ball Adapter with M10 x 1.25 Threaded Post Compatible with RAM Mounts B Size 1 Inch Ball Double Socket Arm

RAM Mounts RAP-B-201U-A Composite Double Socket Arm - Short Arm Compatible with B Size 1" Ball Components

RAM Mounts RAM-B-201U Double Socket Arm (Medium) Compatible with RAM B Size 1" Ball Components