ITEM NAME:8'' Joint Ball Extend Arm for Diving Underwater Photography Lighting System Description: Brand new and high quality Lightweight and highly durable design Portable and easily used High strength corrosion resistance, high joint change Adjustable bracket Specification: 6" Dual Ball: Material: Aluminium alloy Size: 6†(The distance between two o-rings is 6 inch) Width: 2.4cm/ 0.94inch Diameter of the ball: 2.54cm/1inch 8" Dual Ball: Material: Aluminium alloy Size: 8†(The distance between two o-rings is 8inch) Width: 2.4cm/ 0.94inch Diameter of the ball: 2.54cm/1inch Package Includes: 1 Piece Arm Connector Clamp Mount.1 Piece Arm Connector Clamp Mount. High strength corrosion resistance, high joint change. 6" Dual Ball 8" Dual Ball People always bought together with. Lightweight and highly durable design.