RAM Mounts Ball Arm Linker RAM-230U 1.5-inch (Black/Silver)

Color: Black Size: 60.45mm between ball centers Weight [kilograms]: 0.114 kg Material: High-strength aluminum (marine-grade aluminum) Note: [Arm section] This is an optional part. It is a connecting ball for adding or extending the arm section. It is compatible with arms designed for 1.5-inch balls.