Ikelite 1-Inch Ball Arm Extension Mark II 12-Inch LengthIkelite 1 Inch Ball Arm Extension Mark II 12 Inch Length 408112 Ikelite Product Number 4081. 12 A rigid anodized aluminum arm with balls at each end to extend your strobe or video light arm. 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. The slotted design allows for the attachment of a lightweight accessory in the middle of the extension. When