The Vertical Seat Arm mounts into seat post socket in Dolly Turnstile platform and accommodates all industry standard seats. CNC Machined from solid piece of high grade aluminium, it ensures high security and robustness. The Z-shaped Vertical Arm swivels giving camera operators and/or assistants’ flexibility in positioning themselves on the dolly, and locks into position to prevent unwanted swivelling when the dolly is in motion. WHAT’S IN THE BOX Proaim Seat Arm Vertical SPECIFICATIONS Seat Arm Size: 20cm / 8” Construction: Commercial-grade Aluminum Pin Mount Diameter: 25mm