This is the Sealife Flex-Connect Single Tray with Mounting Screw

Features:

• Use the Single Tray to add a light or flash to your underwater camera
• Instantly add grips, lights, flashes and Flex Arms to the Single Tray with just a “click!” and remove them with the push of a button
• Mounts to all cameras with a standard 1/4-20 tripod mount
• Includes mounting knob

Expand your underwater camera
Use the Flex-Connect Single Tray to easily expand your underwater camera with an external light or flash. Mount a light directly to the tray, or add a Flex-Connect Grip or Flex Arm for increased control and comfort. Attaches to any underwater camera with a standard 1/4-20 tripod mount. Includes mounting screw.”