Manfrotto 131DB 23.6-Inch Side Arm for Tripods with 2 heads on 90 Degree (Black)
Mounts on any column with 3/8” thread, this side arm allows positioning of two heads on a 90Degree perpendicular angle. Column travel: 19.41 in.; attachment: 3/8'' screw.; attachment (bottom): 3/8- Inch female thread; attachment number: 2; color: black; length: 23.62 in.; weight: 2.65 lbs.