This 10" Flex Arm from Beneath the Surface has a 1/2" diameter and enables the mounting of round dive light.

FA-10-UNI-CSM

Key Features
  • For Round/Oblong Dive Lights
  • Connects to Cold Shoe Mount
  • Diameter: 1/2"
  • Length: 10"
  • Built-In Safety Cable
  • Joints Can Be Reattached Underwater