Ikelite 1.25in Ball Extension 9in LengthIkelite 1. 25in Ball Extension 9in Length 046809 Ikelite Product Number 0468. 09 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. 9 in (22 cm) extension with 1. 25 in (3. 2 cm) diameter balls at each end. What's Included Ball arm