Size: 8"A set of two 8 inch 15mm Aluminum Rods from. All-aluminum construction, combined with precision machining, ensures that these industry standard 15mm rods will last a lifetime. Coated with black anodic oxidation surface treatment to resist weather, moisture and frequent handling. Can be used with any standard 15mm rod/rail support system, allowing for attachment of on-camera accessories such as a mattebox or follow focus.