Description: The RAP-BB-230-18 consists of a long extension pole with 1" diameter ball ends. The ball ends are compatible with all 1" ball double socket arms. **Please note that the sockets and ball end components on this range of products are a LOOSE fit. To secure these parts, we recommend wrapping tape around the pole for a push fit, or for a more permanent solution, the use of an impact adhesive, like Evo-Stik** Dimensions: Pole Length (Ball End to Ball End): 16.75" Features: 1. Extension poles are buoyant & will float if dropped in the water 2. All components are plastic or stainless steel making this pole system rustproof 3. Lightweight, easily adjustable and packable - easily break down to stow when not in use 4. Modular system allows for infinite configurations. Easily capture self-portrait images from water level, overhead shots and even underwater images 5. Lifetime warranty 6. Made in USA Material: High Strength Composite Ball Size: 1" Rubber Ball "B" Size