This product from RAM Mounts is a short extension pole with two 1" diameter ball ends and a double socket arm. 

Dimensions:
Overall Length (Arm Socket to Ball End): 14" (35.56cm)
Pole Length (Ball End to Ball End): 12.75" (32.38cm)

• Extension poles are buoyant, will float if dropped in the water.
• All components are plastic or stainless steel making this camera system the perfect solution for many outdoor activities, including saltwater applications.
• Light weight, easily adjustable and packable. Easily break down your camera system to stow when not in use.
• Modular system allows for infinite configurations. Easily capture self-portrait images from water level, overhead shots and even underwater images of your latest catch.
• Easily rotate the mounted camera to operate on-board functions, check shot angles and other critical adjustments.
• Lifetime warranty
• Made in USA
• Material: High Strength Composite
• Ball Size: 1" Rubber Ball "B" Size

Note: The "U" in the part number reflects product packaged in poly bag.