Laptop Bag, Case and Backpack - brand 20.8mm Double Ball Joint Arm 9 for Scuba Diving Photograp Blue Highlights brand generic 20.8mm Double Ball Joint Arm 9 for Scuba Diving Photograp Blue Description : High buoyancy capable for ultralight, water arm, underwater camera system. Carbon fiber material to lighten the overall weight, creating extraordinary buoyancy compared to the existing solid arm type float system and hollow arm body design. The hollow arm body not only saves weight, but also increases buoyancy. The ball joint strikes the perfect balance between stable clamping and stress-free handling with the silicone rubber O-ring. The weight of your camera system depends on the shooting style and conditions. Specification: Material: Carbon Fiber and Aluminum Diameter: 20.8mm/0.82inch Length: 9 inch Ball Diameter: Standard 1 inch Package Includes: 1 Piece Floating Light Arm Note: Due to the light and color difference monitors, the item's color may be slightly different from the pictures. Please allow 1-5mm deviation due to manual measurement. THANK YOU FOR BUYING WITH US! Have a good day