ITEM NAME:Black Dive Photography Dual Ball Head Buoyancy Light Ultralight Carbon Fiber Description: Made of ultralight carbon fiber and aluminum alloy,can be used for a long time. ultralight carbon fiber with double ball design,lighten the weight of the brace. The floating arm can be used in a variety of photography situations. Lightweight,highly durable double ball design. Can be used to take photos of water sports. Specification: Material:Carbon Fiber+Aluminum Alloy Size Chart: Diameter of the ball: 20.8 mm/0.8 inch Length:5 inch Package Includes: 1 Piece Float Arm Note: Please allow 1-3mm error due to hand test. The color may have different as the different display..Ultralight carbon fiber with double ball design,lighten the weight of the brace. The floating arm can be used in a variety of photography situations. Material:Carbon Fiber+Aluminum Alloy. Lightweight,highly durable double ball design.