Looking for a professional yet affordable double ball arm? Searching for a sturdy, reliable tool that can perform multiple jobs at once? If so, look no further. Our professional double ball arm is sure to meet your needs. It is one of the best choices for you. Features - Color: Black. - Size: 30 x 4 x 3cm. - Material: Aluminum Alloy. - Aviation aluminum material, professional diving high-strength hard oxidation treatment arm can prevent seawater corrosion. - Strong, lightweight, waterproof aluminum construction. - Use this ball arm between a ball clamp to extend an arm. - Extend the diving light arm to connect multiple diving equipment (such as fill light, float arm, etc.). - You can use this arm to securely attach camera accessories, monitors, lights, or underwater lighting equipment to your favorite camera system. - Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Hope you can understand.