A rigid anodized aluminum arm with balls at each end to extend your strobe arm. Requires compatible clamp at each end. Add an extension and clamp to your existing strobe arm for reduced backscatter and more creative lighting effects when shooting with a wide angle lens. 6 inch (15cm) extension with 1 inch diameter balls at each end. Works with Ikelite, TLC, Ultralight, Nauticam and other 1 in diameter ball arm systems.